Description HOCO.SELECTED MODEL S7S7 Delight wireless headset single ear earphone with mic 50mAh battery for 4 hours of calls / music and 80 hours standby 1. Wireless specification: BT V5.0 BK3266. 2. Support protocols Headset, Hands-free, A2DP, AVRCP. 3. Charging voltage DC5V, charging time about 1.5 hours. 4. Battery capacity: 50mAh. 5: Size 97*45*18mm, weight 9g. 6. Calls / music time: 4 hours, standby time: 80 hours. 7. Digital noise reduction function.