Specifications:
1. Bluetooth version: Realtek V5.0
2. Frenquency Range:  2.4~2.48GHZ
3. Charger Power Supply AC input: 110-240V, DC output 5V
4. Earphone battery capacity: 35mA*2
5. Charging case: 400mAh
6. Charging time: 1 hour
7. Working time: 3-4 hours
8. Working range: 12-15 meters(no obstruct )

Color box size: 11*11*5cm
A set of weight: 0.2kg
Carton Size: 44*41*20cm