Smart Cycling Helmet Lighting Bluetooth

Bluetooth: BLE4.0 + HFP / HSP / A2DPBluetooth distance: up to 10 metersSpeaker: Stereo 2 * 0.5 wattsMicro: -39dB microphoneTaillight: 8 copies of the queue + left + right 3 copies of 3 LED lightsKey: power (play, pause, stop); volume +/-Charge Interface: Micro USBElectrical parameters: DC5V / 0.5ABattery capacity: 3.7 V / 380 mAh (1.4WH)Charging time: 1.5 hoursMaturity: less than or equal to 10 hoursTime standby: less than or equal to 180 daysColor: blue + whiteMaterial: ABSSize: 28 * 22 * 15 cmSuitable for: headband 54-62 cmNote: Shooting lights and different displays may cause the colors of the items in the picture to be slightly different from the actual situation. The permissible measurement error is +/- 1-3 cm.Low version with no light, can answer, music play, SOSRemote control full-featured