Pyle Pro plmrmp2 a Hydra Series Waterproof MP3 / iPodR Marine Power Amplifier Amp 2 Channels, up to 600W, 150W RMS x 2 @ 4ohm). Electronic crossover network, 2 ohm stereo stable antithump when turned on and off soft to turn on/off high and low level input RCA line input, power protection circuit, FREQ response: 10Hz-40khz, waterproof iPod (R) / MP3 3.5mm stereo - RCA adapter & volume-gain remote, DIM: 2.05" H x 3.5" H D, 300 W Max X 2 @ 4ohm, 150W RMS x 2 @ 4ohm, 500W RMS x 2 2ohm