Helmet to Helmet Communicator 2-Way Communication System Earphone+Mic

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