Features
Speaker with stylish panel
High capacity rechargeable lithium battery
Support vanous audio inputs: Memory Card/USB/FM/AUX
With main volume control

Specifications 
Power output: 5W
Speaker size 4 inch
Battery capacity: 1200mAh
Play time: up to 4 hours
DC5V: Charging jack, you can use the dedicated adapter to charge.
TF CARD: Insert the TF card to piay MP3 music.
AUX: Use the cable with MIC USB to 3.5mm piug to connect the AUX
USB: Insert U disk to play mp3 music.
ON-OFF: ON-OFF