Noise Reduction Clear AudioAdvanced noise suppression technology ensures clear voice quality at high speed. Even on noisy roads, you can keep a clear conversation with your teammates to avoid losing contact. Hands-free SpeakerOur motorcycle bluetooth headset provides easy hands-free communications for you while riding. You can make or receive hands-free calls, listen to the best stereo music or listen to GPS voice guidance. Long Standby BatteryThe helmet headset has 500mAh rechargeable battery that will give up to 32 hours talk time when connected to mobile phone. And it only needs to be charged for 4-5 hours which is very conventient. Excellent WaterproofThe helmet communication system is the easiest to use, portable, durable, weather proof and long-lasting device that will withstand any weather condition on any type of helmet making it ideal for motorcycle riding, skiing and other adventurous sports. Widely CompatibleSuitable for any full-face helmets and most half-face helmets which can cover ears. Bigger push-button make it easy to operate even with glov es. And it adopts the buckle type connection between the headset and the clip, easy to assemble / disassemble. Specifications: Color: Black Bluetooth version: V4.0+EDR. Frequency range: 2.4026GHz-2.480GHz. Transmission distance: 10M (transmission distance varies depending on environmental factors and devices). MIC distance: 1 meter. Battery: 3.7V/500mA rechargeable bttery(built-in). Charging time: 4-5 hours. Standby time: about 180 hours. Continuous working time: about 32 hours. Protection grade: IP54 waterproof and dustproof. Size: about 50x35x12mm. Package includes: 1* Helmet Bluetooth Headset 1* USB Cable 1* User Manual 2* Magic sticker top 2* Magic sticker bottom