HamiltonBuhl Flex-Phone TRRS Headset with Gooseneck Microphone
SKU: KFX2-BLK
Ships in 1–2 business days. Orders typically arrive in 3–8 business days.
Free shipping on orders of $200+ (contiguous 48 states)That’s about 9 of this item. Ordering for a class? See class packs or request a quote.
Tax-exempt or paying by PO? Request a quote with your exemption certificate and we’ll remove sales tax. Request a quote · How to order with a PO
The HamiltonBuhl Flex-Phones TRRS headset is made for the youngest students, Pre-K through grade 5. The soft, twistable foam headband bends instead of breaking, a steel-reinforced gooseneck mic captures their voice, and one 3.5mm TRRS plug works with Chromebooks and tablets for listening and speaking.
At a glance
- Connection: 3.5mm single plug, TRRS (audio + mic)
- Microphone: omnidirectional, steel-reinforced gooseneck
- Fit: mid-size on-ear, twistable EVA foam headband, snap-on extension band for smaller heads
- Volume: volume-limited for young listeners
- Cord: 4 ft Dura-Cord, chew-, kink- and knot-resistant
- Warranty: 1-year manufacturer warranty
Buying for a school or district?
- Purchase orders accepted from schools, districts and government agencies; tax-exempt purchasing supported.
- Volume pricing for classroom and district quantities: request a quote and we usually reply within one business day.
- Free shipping on orders over $200 to the contiguous 48 states.
Why schools choose Flex-Phones
- Bends instead of breaking. The flexible EVA foam headband twists and flexes with young students, and the materials are non-toxic and BPA-free.
- Sized for little heads. A snap-on extension band gives smaller children a snug fit.
- A mic that stays put. The steel-reinforced gooseneck bends into position and holds it.
- Chew-resistant Dura-Cord built for the way young students treat cables.
- Own storage bag. Each headset comes in a reclosable, moisture-resistant bag, which HamiltonBuhl designs to help prevent the spread of head lice.
Device compatibility
Classroom uses
- Early literacy, phonics and reading apps with spoken responses
- Online assessments with listening and speaking sections
- ESL/ELL and speech programs
- Video calls and virtual lessons
Equipping a whole grade? See the Flex-Phones TRRS headset 42-pack. USB devices can use the Flex-Phones USB headset, and listening-only rooms the Flex-Phones foam headphones.
Specifications
Show all specifications
| Model / SKU | KFX2-BLK |
|---|---|
| Design | Mid-size, on-ear |
| Headband | Twistable EVA foam, snap-on extension band |
| Cushions | Soft leatherette |
| Plug | 3.5mm TRRS, 120° angle, thin barrel |
| Cord | 4 ft Dura-Cord, braided nylon, PVC-jacketed |
| Speaker drivers | 30 mm |
| Frequency response | 20 Hz – 20 kHz |
| Impedance | 32 ohms |
| Sensitivity | 97 dB ±4 dB |
| Microphone | Omnidirectional, passive noise cancelling, steel-reinforced gooseneck |
| Mic sensitivity / response | -42 dB ±3 dB / 100 Hz – 10 kHz |
| Compliance | Prop 65 compliant; non-toxic, BPA-free |
| Warranty | 1 year (HamiltonBuhl) |
Care
Hold the plug, not the cord, when disconnecting; wipe the cushions between users; and keep each headset in its own labeled bag. See our school headphone care guide.
Common questions
What ages is it for?
Pre-K through grade 5. The snap-on extension band helps it fit smaller heads.
Will it work on our Chromebooks?
Yes, on Chromebooks with a 3.5mm headset jack. USB-C-only models need a USB-C to 3.5mm headset adapter.
Is it volume-limited?
Yes. Flex-Phones are volume-limited to help protect young listeners.
School & district orders
Buying for a classroom or school?
Ordering 25 or more? Ask for school pricing. Share your quantity and budget, and we'll send a formal quote, usually within 1 business day.