Speaker Genius SP-900BT Caixa de Som Genius Portable Bluetooth Speaker 2 watts (SP-900BT)

Impedance  
4 ohm + / -10%

RMS (Watts)    
2W

Frequency Response    
200 Hz ~ 20 KHz

Color    
Black

Battery    
700mAh rechargeable Lithium Ion

Microphone included 

Power ON / OFF  

Volume Control