Dimension:23*18*5cm

Input sensitivity:500mV         
Output Power:1W*4 8(OHM) 10% TDH          
Speaker:1.25inch*4,4(OHM) 3W        
Function: Vol+ Vol- Control, Power, SwitchAA Size Battery (not included)        
System Response:60Hz -18KHz +/- 3dB   
with all ipod and mobile socket