Chin Bluetooth Earbuds is a Bluetooth 5.3 version, compatible with any Bluetooth-enabled device, with noise-reduction technology presents a powerful and wide sound range. Power level can be displayed on the charging box. They can be used to play music and pick up phone calls last up to 4 hours, and can be recharged in its charging box with 350mAh. Earphones are designed to fit the contours of the human ear to make them comfortable to wear and not falling out when running or working out.