Content:

  :High quality RCA input/output socket    
2:Power switch, with USB port for MP3,MP4 charge 
3:Volume 7 color LED display    
4:Treble, Bass, Balance, Volume control
5:Technical parameter: Total harmonic distortion: 0.4% 
6:S/N 75dB     
7:Frequency Response 29-18KHz  
8:THD 0.1%(1KHz)    
9:Output Power RMS 20W X 2CH AT 14.4V DC INPUT
10:Supply voltage 9-14.4V DC