Ear Headset With Mic Bluetooth 5.2 Earphone LED Display Earpiece Wireless Handsfree Headphone Features: 1: Humanized design no longer have to worry about the headset not seeing the battery 2:Ergonomic design does not hurt and does not fall off for a long 3:Lightweight body design, matched with the three-point ear structure 4:Wireless Bluetooth headset car sports ear-mounted super long battery life Product Description: 1.Bluetooth version:V5.2 2.Transmission distance:15m 3.Bluetooth protocol: HFP/HSP/A2DP/AVRCP 4.Working voltage:3.3V-4.2V 5.Charging voltage:4.8--5.2V/0.5-2A 6.Battery capacity: 300 7.Charging time:1-2 hours 8.Music :30 hours of continuous playback 9.Calling Time:30 hours of continuous talk 10.Standby Time:365 days long standby 11.Function keys: button function 12.Microphone type: built-in Mic 13.LED Power Display:battery is clear at a glance 14.Comfortable To Wear:270 degree rotation, can be worn on both left and right ears 15.Functions: play / call, power display, voice answering, caller ID Packing list: 1 x Bluetooth Earphones 1 x charging line 1 x carton