Product parameters: One button control easily to turn on / off, play / pause / music switch Hands free calling to drive, work, meeting, run. Smart compatibility: support all bluetooth cell phone, tablet, notebook, qq music, movies, etc., universal all mobile phone. Parameters: 1.Bluetooth Transmission Range: 10 Meters 2.Operation Mode: Smart Touch 3.Compatible: Android, iOS, Microsoft, Tablet, 99% of the phones with Bluetooth. 4. The Left And Right Ears Can Be Used Separately And Can Be Independently Matched With Bluetooth Devices 5. Smart Touch Design, Easy To Operate Vocalism Principle:Dynamic Control Button:Yes Function 1:Operation Range 10 Meters; Bluetooth V4.1; With Microphone Function 2:2 Hours Charging Time; 100 Hours Standby Time Function 3:60mAh Battery Capacity; Up to 6 Hours Talk / Music Time Suitable:For Apple iPhone X 8 7 Xiaomi mi Sony Samsung Huawei Meizu 🙆Tips: When purchasing a tws Bluetooth headset, please read the following instructions: Due to long-term transportation, the power of the tws headset will be exhausted. After receiving the package, you will not be able to use the headset, and it may be powered off. The first thing to do is to remove the blue protective film under the earphones and charge the earphone box for 30 minutes. Very important. Thanks! When the earphones is connected for the first time, if it is not operated correctly, the earohones may not be successfully paired. It will cause only one of the earphones to make a sound, but not both. Please follow the steps below to solve the problem. 1.take out from the charging case 2.turn one earphone 3.the red and blue lights flicker alternately, ,the light won't flash after 3 seconds 4.Turn on Bluetooth on your phone or other device 5,you can hear the ”connected“ after the connection is successful