4.3” Waterproof Bluetooth/ APP Ready StereoFeatures:200 watts maximum power handling (26W x 4)Two-piece modular design (commander and hideaway module)Waterproof commander (IPX6) and module (IPX5)App Ready - All primary unit functions can be controlled by any iOS or Androidbased mobile device with downloaded Polk Ultramarine appFull iPod;/iPhone; control and charging (via USB)Bluetooth streaming audio (A2DP) and controls (AVRCP)SiriusXM-Ready™ (requires SXV300V1M tuner and subscription)USB jack for connection of digital media devicesSeven-channel NOAA weatherband tunerAM/FM tuner (US/Euro)Auxiliary line-level audio input (RCA)Four-channel line-level audio output (RCA, front + rear)Silicone rubber protective coverTwo-wire power system with non-volatile memoryLow battery warningConformal coated circuit boardsCorrosion resistant (ASTM D1141) UV resistant (ASTM D4329)WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.