?Perfect device for 2 people communicating when driving motorcycle.<br> <br> Features:<br> Freely talking with high quality voice.<br> Adjustable microphone£¬ so easy to control.<br> 2 volume controller for both earphones.<br> Enjoy stereo audio from portable sets(CD£¬ MP3£¬ MP4£¬two way radio£¬cellphone etc).<br> Mini appearance for convenient operation.<br> Made of durable material£¬ long time use.<br> Lower power consumption.<br> <br> Specifications:<br> Color: Black<br> Power source: UM-4(size AAA) * 2 pieces<br> Rated output: 150mW<br> Frequency response: 50 to 20£¬000Hz +/-3dB<br> Output circuit: 32¦¸£¬ 150mW£¬ 84dB¡À3dB<br> Host dimension: 63 * 56 * 25mm<br> Operating temperature: -20 to +50 degree<br> Package Size: 30 * 20 * 3cm / 11.8 * 7.9 * 1.2in<br> Package Weight: 144g / 5.1oz<br> <br> Package List:<br> 1 * Intercom Host<br> 2 * Earphone with Mic<br> 1 * Audio Cable<br> 1 * English User Manual<br>  <br>  <br>  <br>  <br>  <br>  <br>  <br>  <br>  <br>  <br>