Sony ECM-AW4 Bluetooth Wireless Microphone System (Black)

The Sony ECM-AW4 is a compact, battery-powered Bluetooth wireless microphone kit that makes it easy to capture clear speech for video and presentations. It includes a clip-on transmitter with a built-in mic, a receiver that plugs into a camera or recorder’s 3.5 mm mic input, and a two-way “talk-back” feature so the operator can communicate with the subject during recording.

At a glance

• System type: Bluetooth wireless mic system (transmitter + receiver)
• Connection to camera/recorder: 3.5 mm microphone input (receiver output)
• Wireless range: Up to ~50 m / 150 ft line-of-sight
• Mic capsule: Monaural electret condenser
• Directivity: Omni / non-directional
• Two-way audio: Talk-back between receiver and transmitter
• External mic support: Yes, 3.5 mm plug-in power supported
• Monitoring: Headphone jack on both transmitter & receiver
• Battery: AAA (transmitter & receiver)
• Battery life: Up to ~3 hrs continuous use (standby up to ~9 hrs on mic)
• Included: Belt clip, armband, windscreen, recording cable, earphones, carrying pouch

Key features for education

• Clear speech capture for lectures, demonstrations, and student presentations.
• Wireless freedom allows teachers or students to move naturally while staying audible.
• Talk-back mode is handy for student film crews—operators can cue talent quietly.
• Built-in mic plus external mic option supports flexible setups (lav, headset, or handheld mic).
• Lightweight wear options with belt clip and armband for different clothing needs.

Compatibility and setup

The receiver connects to any camera, DSLR, camcorder, audio recorder, or computer interface with a 3.5 mm mic input. Pairing is simple one-touch Bluetooth. The transmitter can be clipped to clothing or worn on the armband; plug in an external mic if preferred. Both units include headphone jacks for real-time monitoring and talk-back audio. :contentReference[oaicite:2]{index=2}

Best use cases

• Teacher or guest-speaker audio for recorded lessons
• Student film, news, or broadcast projects
• Interviews, documentaries, and oral-history assignments
• Campus events where a simple wireless mic is needed

Classroom notes

• Battery-powered: Uses AAA batteries; keeping rechargeable AAA sets on hand is ideal for programs.
• Range depends on environment: Indoor walls and heavy Wi-Fi traffic can reduce distance vs. open spaces.
• Mono recording: Optimized for voice clarity, not stereo music capture.

Purchasing for schools and districts

Learning Headphones supports purchase orders, tax-exempt checkout, and volume pricing. If you’re building student production kits, our team can help confirm compatibility with your cameras and recommend mic accessories.