Features:- Volume adjusting and host switch.- Treble / Bass / Volume control.- 2 channels stereo, suitable for car, motorbike, boat or home use.- Small size, it's portable and can be installed anywhere.Specifications:Input Voltage: DC 12VInput Current: 3A-5AFrequency Response: 20Hz ~ 20kHzOutput Power: RMS 20W + 20W 1kHzChannel: 2Sensitivity: 0.25mv-50mvSNR: 85dBThe Signal Level: 220MV 47KHigh Control: 12dB +- 10KHzBass Control: 12dB +- 100HzSpeaker Impedance: 4 - 16 OhmMaterial: Lightweight AluminumColor: Red/Blue