Spec.  

Shuttle-box vibration speaker

 

Stick on different surface with different sound quality 

Power output: 2W

Built-in Li battery
Audio Socket: 3.5mm stereo jack
Frequency: 18HZ—20KHZ
SNR:  over 85db
Distortion Factor:less 0.5%
Impendence: 4ohm
Power supply: Build-in Lithium battery or USB cable or DC 5V adapter