Product parameters:Colour: BlackBluetooth version: 5.0Battery capacity: about 300mAhCharging voltage: USB5VWorking hours: about 70 hours (according to the volume of the call and listening to music)Noise ratio: 80dBBluetooth distance: 20 metersAnswering method: automatic answering / manual answeringStandby time: about 1000 hoursFrequency: 180-2000khzWaterproof rating: IP5 level Note (it is rainproof and can not be soaked in water)FeaturesApplication range of helmet bluetooth headsetIt can be used for motorcycle riding, race car driver, skiing, foreign trade brother, construction helmet, outdoor sports, etc.Support battery reminder Support Bluetooth music Support call Support One piece to make a call.Riding call clarity, you don’t have to wear the earphones on your ears, the ears feel comfortable, ordinary Bluetooth headsets, the ears are uncomfortable after wearing for a long time, and the calls are not clear and inconvenient when riding.Intelligent voice assistantShort press once: turn on/off the voice assistantShort press twice: replay the last callShort press once: hang up the call