ZNU 200w FM Audio+Mp3 speaker Hi Fi Mini Amplifier for ipod Motorcycle car Mini Amp Blue Mini Hi-Fi Audio Stereo Motorcycl Car Amplifier AMP USB SD/MM\ FM Radio MP3 Elect high-power four channel professional power amplifier integrated circuits, minimal distortion, strong power Pre-professional level input operational amplifier IC for circuit design, sound , transparent,bright. Filtering and anti-large-capacity power circuit.DSP sound field pattern of the four Notice : This Amplifier did not include the power adapter