1. Bluetooth V5.2, support most bluetooth devices and low power consumptio. 2. 300mAh charging box can fully charge 2 earphones about 4 times, providing more music time. 3. No need to put the headphones in your ears, provides comfortable wearing 4. 8mms dual-drive units, enjoy HIFI strong deep bass music sound 5. Popular one-button control, support switch songs, phone call, volume control and voice call. 6.Not worn in the ear, comfortable and painless. 7.Small electric radiation, no face, sports sweat, no bacteria breeding. 8.Binaural separation design Both ears can be. 9.connected to a mobile phone at the same time, or two mobile phones can be connected separately. 10.Double ear stereo surround, you can enjoy HiFi stereo sound.