Noise reduction and clear audio Advanced noise suppression technology ensures high-speed clear voice quality. Even on noisy roads, you can keep a clear conversation with your teammates to avoid losing contact. Hands-Free Speakers Our motorcycle Bluetooth headsets provide you with effortless hands-free communication while riding. You can make or receive speakerphone calls, listen to the best stereo music, or listen to GPS voice guidance. The long standby battery helmet headset has a 500mAh rechargeable battery that provides up to 32 hours of talk time when connected to a phone. Just charge for 4-5 hours, very convenient. Excellent Water Resistant Helmet Communication System The most easy to use, portable, durable, weatherproof and long lasting device that can withstand any weather conditions on any type of helmet, making it ideal for motorcycle riding, skiing and other adventures Ideal for sports. Wide Compatible Fits any full helmet and most half helmets that cover the ears. Larger buttons make it easy to operate even with gloves. And the earphone and the clip are connected by a snap, which is easy to disassemble and assemble. Specifications: Color: Black Bluetooth Version: V4.0+EDRF Frequency Range: 2.4026GHz-2.480GHz Transmission Distance: 10M (Transmission distance varies with environmental factors and devices) MIC Distance: 1 meter Battery: 3.7V/500mA Rechargeable battery (built-in) Charging time: 4-5 hours Standby time: about 180 hours Continuous working time: about 32 hours Protection class: IP54 waterproof and dustproof