Model A889 Quantity 1 piece(s) Color White + red + silver Material PE Amplifier Class AB Function Applies to computer family living room car Singnal Compatible Can connect to computer cell phone CD VCD DVD. MP3 and other digital audio signal input Frequency response 10~100000 Hz Number of Channels 2 Input Power 12~25W Peak Power Output 9W 4g 10% RMS Power Output 25W 4ohm 12W 8ohm Input Sensitivity 200mv +/- 10mv lnput Impedance > 10Kohm Signal To Noise Ratio >/= 90 dB Slewing Rate 81% @ 20W 4ohm 88% @ 12W 8ohm Input Voltage 9V Speaker Impedance 32ohm THD (Total Harmonic Distortion) 60dB Interface USB Remote Control No Application Cars mobile advertising clothing stores barber shops leisure library mall supermarket home theater factory workshop; Compact simple high quality sound system solution Other Features Restore the details and vibrance that your music lost during MP3 compression; Enjoy all your music and movies in surround sound on any stereo speaker system or headphones; Connect in seconds to your notebook PC or Mac to create an extreme fidelity sound system Packing List 1 x Amplifier 1 x Pouch 1 x CD