Bluetooth earphones

Specifications:
Built-in bluetooth: Action chip
Bluetooth working range: 10 meter
Built in lithium battery: 50mAh*2
Speaker power: 30 ohm
Speaker size: 8mm
S/N≥109dB
Working time: 2.5 hours/ per charge
Charging time: 2 hours
Lithium battery capacity: 450 mAh
Standby time: 150 hours