E57 Essential business BT headset

1. Material: ABS 2. Size: L71×W26×H16mm; Net weight: 10g 3. Bluetooth 5.0, chip: BK 3266 4. Battery capacity: 170mAh; charging time: about 1.5 hours 5. Talk/music time: 10 hours 6. Standby time: 200 hours 7.Voice prompt switch：When not connected, double-click the multi-function button and there will be a beep