Specifications :
- Frequency response : 150-18000HZ
- Signal and noise ratio of power amplifier : >80dB
- Loudspeaker : 4 inch (external diameter 102mm) magic resistant 2 Ohms
- Power supplied : power adapter 5.0V/1A
- Mode : USB/TF/FM/AUX/BT
- Color : Black,Red,Blue