SHIDU Portable Voice Amplifier With Wireless Microphone For Teachers IPX5 Waterproof Bluetooth Speaker 4400mAh Power Bank M800

SHIDU Portable Voice Amplifier With Wireless Microphone For Teachers IPX5 Waterproof Bluetooth Speaker 4400mAh Power Bank M800

Specifications: 

1. Output Power: 18W
2. Charging Voltage: DC 5V
3. Lithium Battery:  3.7V/4400mAh
4. Working Time:With 50% Volume
8~10 Hours (musical mode);
10~15 Hours (MIC mode)
5. Charging Time: 3~5 hours
6. Product Size: 120*96*45mm
7. Unit Weight: 392g
8. Available Color: Green; Black
9. Working Temperature: -10℃~45℃
10. Frequency Response: 90Hz~18KHz
11. Wireless Distance:30-35m