ZEALOT S39 Portable Subwoofer Wireless Bluetooth Speaker with Built-in Mic, Support Hands-Free Call & TF Card & AUX (Black)

1. Portable adjustable shoulder strap, easy to carry
2.60mm dual magnetic loudspeakers, stereo surround
3. Support TF card and U disk playback, can also be used without Bluetooth
4. Built-in sensitive microphone, smart and clear call
5. AUX audio input, easy wired connection
6. Smart touch buttons, non-slip and sensitive

specification:
1. Bluetooth version: V5.0
2. Speaker: 4 ohm 18W
3. Transmission distance: about 10m
4. Frequency response: 80Hz-20KHz
5. Signal to noise ratio: 85dB
6. Working voltage: 7.4V
7. Charging voltage: DC5V
8. Charging port: Micro USB
9. Battery capacity: 3600mAh
10. Talk time: about 3h
11. Music playback: about 3h
12. Standby time: about 30 days
13. Charging time: about 4h (different charger specifications time are different)
14. Output power: 20W
15. USB input: 5V 2A
16. Size: 375x154x150mm