Products

HamiltonBuhl HA2 Lab Pack - Green - 24 PackAffordable, classroom‑ready listening kit featuring HamiltonBuhl HA2 personal headphones. Durable, easy‑clean design — ideal for labs, centers, and testing.Choose Your ColorGreen • OrangeAlso AvailableGalaxy Sack‑O‑Phones · Sack‑O‑Phones 10‑PackWhat’s Included (24) HA2 Green Personal Headphones (1) Heavy‑duty Polyester Carry Case Headphone Specs (HA2) Driver: 30 mm Frequency Response: 50 Hz – 16 kHz Impedance: 32 Ω Sensitivity: 90 dB ±4 dB Plug: 3.5 mm stereo, thin barrel Cord: 5′ Dura‑Cord (chew‑resistant, braided nylon) Design: On‑ear, personal; replaceable foam cushions RelatedSchool Headphones • Classroom Packs • Audio AdaptersBuying for a district? We accept POs and offer volume pricing. All products undergo quality assurance checks. Free shipping on orders in the 48 contiguous U.S.

HamiltonBuhl HA2 Lab Pack - Orange - 24 PackAffordable, classroom‑ready listening kit featuring HamiltonBuhl HA2 personal headphones. Durable, easy‑clean design — ideal for labs, centers, and testing.Choose Your ColorOrange • GreenAlso AvailableGalaxy 5‑Pack · Sack‑O‑Phones 10‑PackWhat’s Included (24) HA2 Orange Personal Headphones (1) Heavy‑duty Polyester Carry Case Headphone Specs (HA2) Driver: 30 mm Frequency Response: 50 Hz–16 kHz Impedance: 32 Ω Sensitivity: 90 dB ±4 dB Plug: 3.5 mm stereo, thin barrel Cord: 5′ Dura‑Cord (chew‑resistant, braided nylon) Design: On‑ear, personal; replaceable foam cushions RelatedSchool Headphones • Classroom Packs • Audio AdaptersBuying for a district? We accept POs and offer volume pricing. All products go through quality assurance checks. Free shipping on orders to 48 contiguous U.S.

HamiltonBuhl HA2 Sack-O-Phones - Blue - 10 PackAffordable, classroom‑ready listening kit featuring HamiltonBuhl HA2 personal headphones. Durable, easy‑clean design — ideal for labs, centers, and testing.Choose Your ColorGreen • Purple • Orange • BlueAlso AvailableGalaxy 5‑Pack (Jackbox) · Lab Pack 24What’s Included (10) HA2 Blue Personal Headphones (1) Sack‑O‑Phones Carry Bag Headphone Specs (HA2) Driver: 30 mm Frequency Response: 50 Hz – 16 kHz Impedance: 32 Ω Sensitivity: 90 dB ±4 dB Plug: 3.5 mm stereo, thin barrel Cord: 5′ Dura‑Cord (chew‑resistant, braided nylon) Design: On‑ear, personal; replaceable foam cushions RelatedSchool Headphones • Classroom Packs • Audio AdaptersWe accept POs and offer volume pricing. Free shipping on orders within the 48 contiguous U.S. All products go through quality assurance checks.

HamiltonBuhl HA2 Sack-O-Phones - Green - 10 PackAffordable, classroom‑ready listening kit featuring HamiltonBuhl HA2 personal headphones. Durable, easy-clean design — ideal for labs, centers, and testing.Choose Your ColorGreen • Purple • Orange • BlueAlso Available5-Pack · Galaxy Sack‑O‑Phones · Lab Pack 24What’s Included (10) HA2 Green Personal Headphones (1) Sack‑O‑Phones Carry Bag Headphone Specs (HA2) Driver: 30 mm Frequency Response: 50 Hz – 16 kHz Impedance: 32 Ω Sensitivity: 90 dB ±4 dB Plug: 3.5 mm stereo, thin barrel Cord: 5′ Dura‑Cord (chew‑resistant, braided nylon) Design: On‑ear, personal; replaceable foam cushions RelatedSchool Headphones • Classroom Packs • Audio AdaptersWe accept POs and offer volume pricing. Free shipping on orders within the 48 contiguous U.S. All products go through quality assurance checks.

HamiltonBuhl HA2 Sack-O-Phones - Orange - 10 PackAffordable, classroom‑ready listening kit featuring HamiltonBuhl HA2 personal headphones. Durable, easy‑clean design — ideal for labs, centers, and testing.Choose Your ColorGreen • Purple • Orange • BlueAlso AvailableGalaxy Sack‑O‑Phones · Lab Pack 24What’s Included (10) HA2 Orange Personal Headphones (1) Sack‑O‑Phones Carry Bag Headphone Specs (HA2) Driver: 30 mm Frequency Response: 50 Hz – 16 kHz Impedance: 32 Ω Sensitivity: 90 dB ±4 dB Plug: 3.5 mm stereo, thin barrel Cord: 5′ Dura‑Cord (chew‑resistant, braided nylon) Design: On‑ear, personal; replaceable foam cushions RelatedSchool Headphones • Classroom Packs • Audio AdaptersWe accept POs and offer volume pricing. Free shipping on orders within the 48 contiguous U.S. All products go through quality assurance checks.

HamiltonBuhl HA2 Sack-O-Phones - Purple - 10 PackAffordable, classroom‑ready listening kit featuring HamiltonBuhl HA2 personal headphones. Durable, easy‑clean design — ideal for labs, centers, and testing.Choose Your ColorGreen • Purple • Orange • BlueAlso AvailableGalaxy 5-Pack (Jackbox) · Lab Pack 24What’s Included (10) HA2 Purple Personal Headphones (1) Sack‑O‑Phones Carry Bag Headphone Specs (HA2) Driver: 30 mm Frequency Response: 50 Hz–16 kHz Impedance: 32 Ω Sensitivity: 90 dB ±4 dB Plug: 3.5 mm stereo, thin barrel Cord: 5′ Dura‑Cord (chew‑resistant, braided nylon) Design: On‑ear, personal; replaceable foam cushions RelatedSchool Headphones • Classroom Packs • Audio AdaptersWe accept POs and offer volume pricing. Free shipping on orders within the 48 contiguous U.S. All products go through quality assurance checks.

HamiltonBuhl HA2 SchoolMate Headphones - Color OptionsThe HamiltonBuhl SchoolMate HA2 personal‑sized, on‑ear headphones are built for learning in style. Available in four vibrant colors—blue, green, purple, and orange—these are designed for durability, comfort, and great sound in classrooms, testing centers, and home learning setups.Color OptionsBlue • Green • Purple • OrangeDescription & Features Durable & tangle-free Dura‑Cord™: chew‑, kink‑, and tangle‑resistant Lightweight, adjustable on‑ear design for all‑day comfort High-quality stereo sound with 3.5 mm, 120° thin-barrel plug Compatible with Chromebooks, tablets, computers, CD players, mobile devices, eReaders Certified safe—Prop 65 & CPSIA compliant 1‑year warranty included Specifications Design: Personal, On-Ear Colors: Blue, Green, Purple, Orange Cord: 5 ft Dura‑Cord™ (chew-, kink-, tangle-resistant, braided nylon) Plug: 3.5 mm stereo, 120° thin-barrel Compatibility: works with Chromebooks, tablets, computers (Mac & PC), mobile devices, CD players, eReaders Certifications: Prop 65, CPSIA Warranty: 1 year Why Choose HA2?Built for classrooms and remote learning, the HA2 offers rugged durability, vibrant style, and comfort. Its Dura‑Cord™ ensures students won’t be slowed by damaged cables, while the safe, tested design offers peace of mind. Order individually or in class packs.We accept POs and offer volume pricing. Free shipping on orders within the 48 contiguous U.S. All units undergo quality assurance checks.

HamiltonBuhl HA2-BLU Lab Pack - 24 Blue Headphones + CaseDurable, classroom‑ready listening kit featuring HamiltonBuhl HA2 personal headphones. Built to last and easy to clean — ideal for lab use, testing, and school settings.What’s Included (24) HA2 Blue Personal Headphones (1) Heavy‑duty Polyester Carry Case (LCP3175) Compatible With MP3 Players Cell Phones / Mobile Devices Tablets / eReaders Chromebooks / Computers (Mac & PC) CD Players / Stereos Most Gaming Systems TVs Optional Accessories (Not Included): Refresh kit (replacement cushions + storage bag), sanitary ear cushion covers (box of 50 pairs).Prevent the Spread of Lice: Each headphone includes its own heavy‑duty, write-on, moisture-resistant reclosable bag. When sealed for 24–48 hours, lice die without chemicals.Headphone Specifications Foam Ear Cushions, Replaceable Personal, On‑Ear Design Weight: 5 oz Warranty: 1 Year Speaker Drivers: 40 mm Frequency Response: 20 Hz – 20 kHz Impedance: 32 Ω Heavy‑duty, write‑on, reclosable bag (for hygiene) Plug: 3.5 mm stereo, jacketed Cord: 5′ Dura‑Cord™ (chew, kink & knot‑resistant, braided nylon) Carry Case Specifications Polyester Canvas material Heavy-duty, padded construction built for daily classroom use We accept POs and offer volume pricing. Free shipping on orders to the 48 contiguous U.S. Every product undergoes quality assurance checks.

HamiltonBuhl HA2-BLU Lab Pack - 24 Purple Headphones + CaseDurable, classroom‑ready listening kit featuring HamiltonBuhl HA2 personal headphones. Built to last and easy to clean — ideal for testing labs and centers.What’s Included (24) HA2 Purple Personal Headphones (1) Heavy‑duty Polyester Carry Case (LCP3175) Compatible With MP3 Players Cell Phones / Mobile Devices Tablets / eReaders Chromebooks / Computers (Mac & PC) CD Players / Stereos Most Gaming Systems Optional Accessories (not included): Refresh kit (replacement cushions + storage bag), sanitary ear cushion covers (box of 50 pairs).Prevent the Spread of Lice: Each headphone includes its own heavy‑duty, write-on, moisture-resistant reclosable bag. Sealing in the bag will kill lice in 24–48 hours without chemicals.Headphone Specs Driver: 40 mm Frequency Response: 20 Hz – 20 kHz Impedance: 32 Ω Sensitivity: (not listed) Plug: 3.5 mm stereo, jacketed Cord: 5′ Dura‑Cord™ (chew, kink & knot resistant, braided nylon) Design: On‑ear, personal with replaceable foam cushions Weight: 5 oz Warranty: 1 Year Each unit includes a heavy-duty reclosable bag for hygiene Carry Case Specs Polyester Canvas material Padded and heavy-duty construction Built to withstand daily classroom use We accept POs and offer volume pricing.Free shipping on 48 contiguous U.S. orders.Every product undergoes quality assurance checks.

The HamiltonBuhl® LCP/24/HA2 Lab Pack includes 24 Hamilton HA2 Personal Headphones. This lab pack comes in a Polyester Canvas Carry Case Lab Pack Includes:(24) HA2 Personal Headphones(1) LCP3175 Carry Case*Please Note: Case shape and color subject to change without notice. Compatible With:• MP3 Players• Cell Phones / Mobile Devices• Tablets / eReaders• Chromebooks• Computers (Mac & PC)• CD Players / Stereos• TVs• Most Gaming Systems Prevent The Spread Of Lice:Built with kid's health and safety in mind, these headphones are designed to combat the spread of head lice in schools. Each headphone comes in its own heavy-duty, write-on, moisture-resistant, reclosable bag. When sealed in the bag, lice are killed in 24-48 hours, without the use of chemicals. Headphone Specifications: Foam Ear Cushions, Replaceable Personal, On-Ear Design Weight: 5 Ounces Warranty: 1 Year Speaker drivers: 40mm Frequency response: 20Hz-20kHz Impedance: 32Ω Heavy-duty, write-on, reclosable bag (helps prevent the spread of lice) Plug: 3.5mm Stereo Jacketed Cord: 5' Dura-Cord™ - chew, kink and knot-resistant, PVC-sleeved, braided nylon Carry Case Specifications: Polyester Canvas Carry Case Made of heavy-duty polyester fabric, the new case is built to last and withstand the rigors of daily use. The soft, polyester material with protective padded cushion offers a more comfortable and premium feel.

HamiltonBuhl® Large Carry Case — Lockable Storage for Listening Centers Keep classroom audio gear secure and easy to transport with the HamiltonBuhl Large Carry Case. This durable plastic case is designed for HamiltonBuhl listening centers and accessories, with a lockable latch (lock not included) and molded carry handle for safe, reliable transport. Note: Case color may vary.  Key Features Lockable protection: Latch accepts a padlock to secure contents (lock not included). :contentReference[oaicite:2]{index=2} Durable plastic shell: Rigid construction stands up to daily school use while staying lightweight. :contentReference[oaicite:3]{index=3} Roomy interior for kits: Sized for typical HamiltonBuhl listening center components (boombox/media player, jackbox, headsets, cables). :contentReference[oaicite:4]{index=4} Molded handle: Comfortable carry between rooms, library, and storage. :contentReference[oaicite:5]{index=5} 1-year warranty from HamiltonBuhl. :contentReference[oaicite:6]{index=6} Specifications Construction: Plastic, lockable latch (padlock not included) Approx. dimensions: 21.25″ W × 13.5″ H × 11.5″ D Typical model ref: HMC3166 (retailer listings) :contentReference[oaicite:7]{index=7} Color: Subject to change (manufacturer note) :contentReference[oaicite:8]{index=8} Warranty: 1 year :contentReference[oaicite:9]{index=9} Dimensions and features per Learning Headphones PDP; third-party listings corroborate part # and size range. :contentReference[oaicite:10]{index=10} What fits? Most HamiltonBuhl listening center kits (boombox/media player, jackbox, 4–8 headsets), plus cables. Ideal for classrooms, literacy centers, libraries, and AV storage. :contentReference[oaicite:11]{index=11} Related Accessories Listening Centers — complete kits that pair with this case Headphone storage & racks — organize sets 1–30 Device-safe wipes — quick clean between classes Buying for a district? We accept POs and offer volume pricing. Request a quote.

HamiltonBuhl® Primo™ Stereo Headphones — Black, 3.5 mm Stereo Plug, Classroom-Ready Primo™ headphones deliver clear, reliable audio for K–12 learning with a rugged, school-tough build. Noise-reducing earcups help students focus, while a durable 5 ft Dura-Cord™ and 3.5 mm stereo (TRS) plug provide easy compatibility with classroom devices. Key Features Built for schools: ABS plastic construction with Dura-Cord™ (chew-, kink-, knot-resistant, PVC-sleeved, braided). Comfortable & easy-clean: on-ear design with leatherette cushions for shared classroom use. Clear, focused listening: noise-reducing earcups help block ambient distractions. Universal audio: 3.5 mm stereo plug (TRS)—works with most carts, PCs, Macs, and tablets. Hygienic storage: includes a heavy-duty, write-on, reclosable bag (helps prevent the spread of lice). 1-year warranty from HamiltonBuhl; Prop 65 compliant. Compatibility at a Glance If your device has… This headphone can… Tip 3.5 mm headphone (TRS) jack Play audio (no mic) No adapter needed Single 3.5 mm headset (TRRS) jack Play audio (no mic) Need voice? Choose a TRRS/USB/USB-C headset USB-only device Use a USB audio adapter or pick a USB/USB-C headset See USB/USB-C headsets Specifications Design: Personal, on-ear; color: Black Cushions: Leatherette (wipe-clean) Plug: 3.5 mm stereo, jacketed Cable: 5' Dura-Cord™ (chew-resistant, PVC-sleeved, braided nylon) Drivers: 30 mm Frequency response: 50 Hz – 20 kHz Impedance: 32 Ω Sensitivity: 105 dB ± 4 dB Included: heavy-duty, write-on, reclosable storage bag (helps prevent the spread of lice) Compliance: Prop 65 Warranty: 1 year Model / SKU: PRM100B Ideal For Classrooms, testing labs, libraries, language & literacy apps Chromebook carts and shared learning spaces Related Accessories Storage cases & racks Device-safe wipes Audio adapters (USB audio dongle, extenders) Buying for a school or district? We accept POs and offer volume pricing. Request a quote.

HamiltonBuhl® Primo™ Stereo Headphones — Blue, 3.5 mm Stereo Plug, Classroom-Ready Primo™ headphones deliver clear, reliable audio for K–12 learning with a rugged, school-tough build. Noise-reducing earcups help students focus, while a durable 5 ft Dura-Cord™ and 3.5 mm stereo (TRS) plug provide easy compatibility with classroom devices. Key Features Built for schools: ABS plastic construction with Dura-Cord™ (chew-, kink-, knot-resistant, PVC-sleeved, braided). Comfortable & easy-clean: on-ear design with leatherette cushions for shared classroom use. Clear, focused listening: noise-reducing earcups help block ambient distractions. Universal audio: 3.5 mm stereo plug (TRS) — works with most carts, PCs, Macs, and tablets. Hygienic storage: includes a heavy-duty, write-on, reclosable bag (helps prevent the spread of lice). 1-year warranty from HamiltonBuhl; Prop 65 compliant. Compatibility at a Glance If your device has… This headphone can… Tip 3.5 mm headphone (TRS) jack Play audio (no mic) No adapter needed Single 3.5 mm headset (TRRS) jack Play audio (no mic) Need voice? Choose a TRRS/USB/USB-C headset USB-only device Use a USB audio adapter or pick a USB/USB-C headset See USB/USB-C headsets Specifications Design: Personal, on-ear; color: Blue Cushions: Leatherette (wipe-clean) Plug: 3.5 mm stereo, jacketed Cable: 5' Dura-Cord™ (chew-resistant, PVC-sleeved, braided nylon) Drivers: 30 mm Frequency response: 50 Hz – 20 kHz Impedance: 32 Ω Sensitivity: 105 dB ± 4 dB Included: heavy-duty, write-on, reclosable storage bag (helps prevent the spread of lice) Compliance: Prop 65 Warranty: 1 year Model / SKU: PRM100 (Blue) Ideal For Classrooms, testing labs, libraries, language & literacy apps Chromebook carts and shared learning spaces Related Accessories Storage cases & racks Device-safe wipes Audio adapters (USB audio dongle, extenders) Buying for a school or district? We accept POs and offer volume pricing. Request a quote.

HamiltonBuhl® Primo™ Stereo Headphones — Red, 3.5 mm Stereo Plug, Classroom-Ready Primo™ headphones deliver clear, reliable audio for K–12 learning with a rugged, school-tough build. Noise-reducing earcups help students focus, while a durable 5 ft Dura-Cord™ and 3.5 mm stereo (TRS) plug provide easy compatibility with classroom devices. Key Features Built for schools: ABS plastic construction with Dura-Cord™ (chew-, kink-, knot-resistant, PVC-sleeved, braided). Comfortable & easy-clean: on-ear design with leatherette cushions for shared classroom use. Clear, focused listening: noise-reducing earcups help block ambient distractions. Universal audio: 3.5 mm stereo plug (TRS)—works with most carts, PCs, Macs, and tablets. Hygienic storage: includes a heavy-duty, write-on, reclosable bag (helps prevent the spread of lice). 1-year warranty from HamiltonBuhl; Prop 65 compliant. Compatibility at a Glance If your device has… This headphone can… Tip 3.5 mm headphone (TRS) jack Play audio (no mic) No adapter needed Single 3.5 mm headset (TRRS) jack Play audio (no mic) Need a microphone? Choose a TRRS/USB/USB-C headset USB-only device Use a USB audio adapter or pick a USB/USB-C headset See USB/USB-C headsets Specifications Design: Personal, on-ear; color: Red Cushions: Leatherette (wipe-clean) Plug: 3.5 mm stereo, jacketed Cable: 5' Dura-Cord™ (chew-resistant, PVC-sleeved, braided nylon) Drivers: 30 mm Frequency response: 50 Hz – 20 kHz Impedance: 32 Ω Sensitivity: 105 dB ± 4 dB Included: heavy-duty, write-on, reclosable storage bag (helps prevent the spread of lice) Compliance: Prop 65 Warranty: 1 year Model / SKU: PRM100R Ideal For Classrooms, testing labs, libraries, language & literacy apps Chromebook carts and shared learning spaces Related Accessories Storage cases & racks Device-safe wipes Audio adapters (USB audio dongle, extenders) Minimum Order (3) Buying for a school or district? We accept POs and offer volume pricing. Request a quote.  

HamiltonBuhl Smart-Trek Headphone - Blue AccentsPrefer a different accent color? Pick below.BlueGreenThe Smart-Trek deluxe over-ear headphone is built for daily K–12 use with replaceable leatherette cushions, an adjustable, twistable padded headband, and a tough 5' Dura-Cord™ (chew/kink/knot-resistant, PVC-jacketed braided nylon). A thin-barrel, 120° 3.5 mm stereo plug fits most cases, and the in-line volume control makes quick level tweaks easy for students.Key Features Over-ear comfort: Full-cup fit helps reduce classroom noise; replaceable leatherette pads extend fleet life. 3.5 mm stereo plug: Thin-barrel, 120° angled for case-friendly use on carts and laptops. 5' Dura-Cord™: Braided, classroom-tough cable resists chewing, kinks, and knots. In-line volume control: Student-friendly level adjustment. Classroom-tuned audio: 40 mm drivers for clear, balanced sound in lessons, testing, and media. Specifications Form factor: Over-ear (stereo), Blue accents Drivers: 40 mm Connection: 3.5 mm TRS, thin-barrel 120° plug Cable: 5' Dura-Cord™ (PVC-jacketed braided nylon) Earpads: Leatherette, replaceable Headband: Adjustable, twistable, padded Frequency response: 50 Hz – 20 kHz Impedance: 32 Ω Sensitivity: 100 dB ±4 dB Classroom Tips Number headsets 1–30 per cart/shelf for faster hand-out and return. Keep replacement earpads and device-safe wipes on hand to extend fleet life. Store on racks or bins to prevent cable damage. Compare by Port / Mic Model Port Mic Best For Smart-Trek Headphone (this page) 3.5 mm TRS No Listening-only testing & media AE-35 USB-C Headphone USB-C No USB-C fleets, assessments AC-155 Mobile Headset 3.5 mm TRRS Yes (boom) Chromebook combo-jack carts AC-155 USB Headset USB-A Yes (boom) USB-A desktops/labs Buying for a district? We accept POs and offer volume pricing. Request a quote. { "@context":"https://schema.org", "@type":"Product", "name":"HamiltonBuhl Smart-Trek Headphone — Blue Accents", "brand":{"@type":"Brand","name":"HamiltonBuhl"}, "category":"Headphones", "url":"https://learningheadphones.com/products/hamiltonbuhl-smart-trek-headphone-blue-accents", "description":"Deluxe over-ear classroom headphone with replaceable leatherette pads, adjustable padded headband, 3.5 mm thin-barrel angled plug, 5' Dura-Cord, and in-line volume.", "additionalProperty":[ {"@type":"PropertyValue","name":"Drivers","value":"40 mm"}, {"@type":"PropertyValue","name":"Connection","value":"3.5 mm TRS (thin-barrel, 120°)"}, {"@type":"PropertyValue","name":"Cable","value":"5 ft Dura-Cord (PVC-jacketed braided nylon)"}, {"@type":"PropertyValue","name":"Earpads","value":"Leatherette, replaceable"}, {"@type":"PropertyValue","name":"Headband","value":"Adjustable, twistable, padded"}, {"@type":"PropertyValue","name":"Frequency Response","value":"50 Hz – 20 kHz"}, {"@type":"PropertyValue","name":"Impedance","value":"32 Ω"}, {"@type":"PropertyValue","name":"Sensitivity","value":"100 dB ±4 dB"} ] }

HamiltonBuhl Smart-Trek Headphone - Green AccentsPrefer a different accent color? Pick below.BlueGreenThe Smart-Trek deluxe over-ear headphone is built for daily K–12 use with replaceable leatherette cushions, an adjustable, twistable padded headband, and a tough 5' Dura-Cord™ (chew/kink/knot-resistant, PVC-jacketed braided nylon). A thin-barrel, 120° 3.5 mm stereo plug fits most cases, and the in-line volume control makes level tweaks easy for students.Key Features Over-ear comfort: Deluxe, full-cup fit helps reduce classroom noise; replaceable leatherette pads. 3.5 mm stereo plug: Thin-barrel, 120° angle for case-friendly use on carts and laptops. 5' Dura-Cord™: Chew/kink/knot-resistant braided cable for longevity. In-line volume control: Quick level adjustment for students. Classroom-tuned audio: 40 mm drivers deliver clear stereo sound for lessons, testing, and media. Specifications Form factor: Over-ear (stereo), Green accents Drivers: 40 mm Connection: 3.5 mm TRS, 120° thin-barrel plug Cable: 5' Dura-Cord™ (PVC-jacketed braided nylon) Earpads: Leatherette, replaceable Headband: Adjustable, twistable, padded Frequency response: 50 Hz – 20 kHz Impedance: 32 Ω Sensitivity: 100 dB ±4 dB Classroom Tips Number headsets 1–30 per cart/shelf for faster hand-out and return. Keep replacement earpads and device-safe wipes on hand to extend fleet life. Store on racks or bins to prevent cable damage. Compare by Port / Mic Model Port Mic Best For Smart-Trek Headphone (this page) 3.5 mm TRS No Listening-only testing & media AE-35 USB-C Headphone USB-C No USB-C fleets, assessments AC-155 Mobile Headset 3.5 mm TRRS Yes (boom) Chromebook combo-jack carts AC-155 USB Headset USB-A Yes (boom) USB-A desktops/labs Buying for a district? We accept POs and offer volume pricing. Request a quote. { "@context":"https://schema.org", "@type":"Product", "name":"HamiltonBuhl Smart-Trek Headphone — Green Accents", "brand":{"@type":"Brand","name":"HamiltonBuhl"}, "category":"Headphones", "url":"https://learningheadphones.com/products/hamiltonbuhl-smart-trek-headphone-green-accents", "description":"Deluxe over-ear classroom headphone with replaceable leatherette pads, adjustable padded headband, 3.5 mm thin-barrel angled plug, 5' Dura-Cord, and in-line volume.", "additionalProperty":[ {"@type":"PropertyValue","name":"Drivers","value":"40 mm"}, {"@type":"PropertyValue","name":"Connection","value":"3.5 mm TRS (thin-barrel, 120°)"}, {"@type":"PropertyValue","name":"Cable","value":"5 ft Dura-Cord (PVC-jacketed braided nylon)"}, {"@type":"PropertyValue","name":"Earpads","value":"Leatherette, replaceable"}, {"@type":"PropertyValue","name":"Headband","value":"Adjustable, twistable, padded"}, {"@type":"PropertyValue","name":"Frequency Response","value":"50 Hz – 20 kHz"}, {"@type":"PropertyValue","name":"Impedance","value":"32 Ω"}, {"@type":"PropertyValue","name":"Sensitivity","value":"100 dB ±4 dB"} ] }