Dual MGH20 Marine Boat Digital Recevier W/iPhone/iPod Control+Wakeboard Speakers Marine Boat Digital Media Receiver With iPhone Control, USB Input, and Pandora. Peak Power Output: 240 Watts (60 Watts x 4 Channels). RMS Power Output: 60 Watts (15 Watts x 4 Channels). Pandora Internet Radio Control. IPX6 Waterproof Rated. Zero Current Draw. Low Battery Indicator. Direct Control for iPod and iPhone. USB input: Rear Playback of MP3 and WMA files from compatible flash drives. AUX input: Rear. 30 Stations Preset. AM Stations: 12. FM Stations: 18. 3-Band Equalizer. Wireless Remote. Preamp Output: 1 Pair MOSFET Powered. CEA Compliant Pair of 8" Black WakeBoard Tower Speakers Totaling 600 Watts (300 Watts per speaker). 8" Two-Way High Fidelity Speaker System. Adjustable Nylon Mounting Bracket. Reinforced With Embedded Steel. 1" Polymide Dome Neodymium Midrange Tweeter. Built-In Two-Way Crossover Network. Fully Marinized Against Salt & Fresh Water Conditions Completely Water / Rust Resistant. Terminals Are Sealed with Rubber Gaskets. Specially Tuned for PA Voice Over. Polypropylene Mica Injected Cone with Santoprene Surround. High BL Magnet Motor Structure. Y30 High Density Magnets. Oversized 1.25 Kapton Voice Coil. Large mounting screw accommodates roll bars found on many off road vehicles such as Jeep Wranglers, and ATV's equiped with a roll bar/cage. This gauge hole-size receiver is IPX6 waterproof to withstand heavy splashing and rain. It features direct USB control for iPod and iPhone devices and control for Pandora app on an iPhone connected via USB. Media playback from select Android devices is also available via USB. The USB input for playback and charging, the RCA aux inputs and preamp outputs are located on the back of the receiver.