Bluetooth 5.1 Earbuds with True Stereo System 30mAh 300mAH 3.7V lithium battery for earbuds Headphones Approximately 1.5 hours are needed for charging. Headphones Approximately 4.5 hours were worked. Working time of charging box: two to three times Headphones Waiting period of roughly 280 days Touch multifunction earbuds that can be used to answer calls, pause music, hang up, and adjust volume available hues (green - pink)