2 Channel Stereo PA Mini 80 Watt Amplifier, 12 Volt DCTwo Main Channel Output.Use In Your Car, Boat, RV, Home Or Anywhere You Need A Great AmplifierFeatures:* USB, SD Card Input, FM Stereo radio* Bluetooth* MP3 Audio Format Play* External Audio Input* GH-Power BTL Output* DC 12 Volt DC Input* FM Frequency Range: 87.5 MHz – 108.0 MHz* Frequency Response: 20 Hz – 20 kHz* Output Power: RMS 20 Watt + 20 Watt 1 kHz* Max Output: 80 Watts* Harmonic Distortion: <0.05 Percent 4 Watt 1 kHz* SNR: 85 dB* High Control: 12 dB +/- 10 kHz* Bass Control: 12 dB +/- 100 HzNOTE: 12 Volt DC Power Supply Not Included.Nippon AmericaIS-AMP-221BT