Are you a lover? Are you still looking for helmet headset? , this product is the right option for you. This product is a helmet headphone. It has the advantages of stereo sound, noise reduction, wireless call, sound assistant, long standby time, etc. And it is suitable for all kinds of hemlets. Features -BT Version: 5.0+EDR -Frequency Range: 2.402GHZ-2.480GHZ -Transmission Distance: 10m (Transmission Distance Varies Depending On Environmental Factors and Devices) -Mic Transmission Distance: <= 1 Meter -Battery: 3.7V/500MA -Continuous Working Time: <=20 Hours -Charging Voltage: 5V -Charging Time: 1 Hour -Standby Time: <= 240 Hours -BT name: BT12 -Waterproof Level: IP67 Waterproof -Color:Black -Material:Plastic -Size:8.00X4.50X2.00cm/3.14X1.77X0.79in The wireless helmet headset has IP67 waterproof performance, which is no afraid of rain. Using .0 technology, this wireless helmet headset has low power consumption and signal transmission. With built-in large capacity battery, this helmet headphone has long standby and working time. This headset has the functions of volume addition and subtraction, playback pause, song up/down, and automatic callback, allowing you to operate it more conveniently. And this headphone is suitable for vintage helmets, off-road helmets, half helmets, full helmets, etc. Package list: 1 x Earpiece 1 x USB Cable