<p> <b> Motorcycle Helmet Intercom Feature </b> <br> 1)Power detection function, low power notification: <br> Recorded voice message will tell you. Power over 90%, power over 50%, power below 50%, power below 10% please charge immediately. <br> Can be used while charging to ensure long-distance travel. </P> <p> 2) Crystal clear sound quality <br> - Adopts 30mm speaker providing a high quality full range of sounds<br> - Adopts CVC tech reduces noise for both incoming and outgoing audio.</p> <p>3) Bluetooth communication protocol: HSP, HFP, A2DP, AVRCP, SPP, CVC <br> Driving distance: 500 meters (for two riders), 2000 meters (for groups) </p> <p> 4) Excellent design: Like the concave-convex interface suitable for blind operation. <br> For hands-free calls, One button to answer/hangup/refuse/redial calls . <br> For enjoy music, Easy to play / pause / back / continue </p> <p> 5) Full duplex 8-way intercom group with self-healing technology. <br> If one rider leaves group less than 5 minuts, can rejoin riding group seamlessly. If more than 5 minuts, just one-button to rejoin and stay connection easily. </P> <p> <b> Motorcycle Headset Specification </b> <br> - Bluetooth Version: 4.1 <br> - Battery Type: Rechargeable lithium polymer 900mAh <br> - Standby Time: About One Week <br> - Operating Time: 20 hours <br> - Charging Time: 3 hours <br> - Power Adaptor: DC5V 500mA </p> <p> <b>Motorcycle Interphone Package included</b> <br> 2 × M1-S Pro<br> 2 × Speaker and Hard microphone<br> 2 × Soft microphone<br> 2 × 2.5mm to 3.5mm cable<br> 2 × Velco<br> 2 × Metal clip<br> 4 × EVA rubber<br>2 × Helmet bracket <br> 2 × USB Cable<br> 1 × User Manual</p> <p> <b> Motorcycle Headset Customer Service </b> <br> This Bluetooth helmet intercom includes a 30-day money back guarantee and a 12-month customer service guarantee. Please contact us if you have any problem. </P>