Bluetooth compatible  v5.2, support most of Bluetooth compatible devices and lower power consumption.2000mAh charging case can fully charge 2 earphones around 8 times offers more than 48 hours music time. With waterproof technology, no need to worry about water and sweat.10mms dual drive units, enjoy 9D strong deep bass music sound. Popular touch control function, support switch songs, phone calls and call voice assistant. HD LED display: No need to guess the amount of electricity the earphones have, the LED digital power display displays the remaining power the earphones has left. Quick connect: automatic power on pairing. Once you take the earphones out of the charging compartment, it is auto start and auto match, auto connect back to mobile phone. The charging compartment serve as a power bank and can be used to charge your mobile phone.100% high quality.