JMS4SPKG Marine Entertainment System AM/FM Bluetooth with 4 AMS602W Speakers & Aux InputFeatures:. 160 Watt (40W x 4). Waterproof (IPX6). Bluetooth streaming audio (A2DP/AVRCP). USB input allows connection of digital media devices (MP3/WMA player). AM/FM tuner. Weatherband. Four-channel amplified audio output. Rear auxiliary input (RCA). Rear auxiliary output (2-volt). Conformal coated circuit board prevents damage from high humidity and salt. Corrosion resistant materials/finishes (ASTM D4329). UV resistant front panel (ASTM B117)