Mini Metal Wireless Bluetooth Speaker, Hands-free, LED Indicator(Silver)

1. Output power: 3W 2. SNR: >=80dB 3. Frequency response: 20Hz-20KHz 4. Speaker drivers: 4 ohms 5. Built-in 3.7V 400mAh rechargeable battery 6. Distortion: <1.0% 7. Speaker: 36mm 8. Bluetooth version: V4.2 9. Playback time: Up to 4 hours 10. Charging time: 2 hours 11. Size: 50 x 50 x 33mm, weight: 70g