Hi,my dear angel, welcome to Jacenvly, our products are cheap and good quality, price is fair, you can't miss it. If this product is not your style, please click on our store, we have many kinds of products, there will be you like and suits you. If you have any questions about your purchase, please send us the first message, we offer world class customer service to make your purchase without your worries. Have a nice day. Single 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 time 3:Lightweight body design, matched with the three-point ear gallery 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 time 11.Function keys: button function 12.Microphone type: built-in Mic 13.LED Power Display:battery level 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 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 time 3:Lightweight body design, matched with the three-point ear gallery structure 4:Wireless Bluetooth headset car sports ear-mounted super long battery life