Bluetooth 5.3; chip: JL AC7006A8 Battery capacity: charging case 300mAh; Headset 40mAh Usage time: 7 hours; Standby time: 180 hours Size: 62 * 50 * 30mm; Total weight: 43g ANC+ENC noise reduction true wireless Bluetooth headset with digital battery display; Supports one to two functionality, can be connected to two phones simultaneously. Color: Black