Mini Metal Wireless Bluetooth Speaker, Hands-free, LED Indicator

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