The CMM-20 is a high-performance, dual-zone source unit with built-in power and versatile audio features built for marine applications. Equipped with a variety of audio source options, the CMM-20 features a digital AM/FM tuner with built-in NOAA weather radio (US only), Bluetooth audio streaming, a USB 2.0 input for playback from your USB storage device (with 1A charging) and an analog auxiliary input, all designed to deliver non-stop sound, no matter how choppy the ride may get. A rugged, weatherproof (IP66 rated) chassis houses a 2.37-inch (60 mm) LCD display with dimmable control for nighttime viewing. When in motion, you'll appreciate the large controls and uncluttered user interface with big text and backlit buttons. Flexible audio output options include a rock-solid, onboard amplifier, capable of powering your speakers with 100 watts (25W RMS x 4 @ 4 ohms) of high-fidelity sound to two main zones, as well a stereo pair of crystal-clear preamp outputs (1.5V RMS), with selectable Zone 2 or subwoofer functionality. Customize your sound with onboard tone controls (Bass & Treble) or select from four equalizer presets. Features: Weatherproof, single-chassis source unit with built-in power and versatile audio features, specifically built for marine applications. Salt & Sun Certified / Water Resistant Flexible Audio Capabilities Clean Looks with Excellent Ergonomics Loaded with Great Source Options