Lossless Music Experience This marine gauge stereo supports subwoofer output and a 4x50W amplifier. It offers full control over bass, treble, balance, and fader, plus a custom preset EQ to help you find your music style. It operates on DC 12V and provides a maximum power output of 4x50W. Bluetooth A2DP Music Streaming Bluetooth 5.0 enables wireless streaming from smartphones, tablets, and other devices to the marine stereo with a stable signal. Poweroff memory is supported, so the unit can resume playback from the last track after a power outage. IPX5 Waterproof Widely Applicable Designed for the marine environment, this unit features IPX5 waterproofing and UV coatings to withstand humidity and saltwater exposure. It uses a standard tachometer gauge design and requires a cutout of 2.89 inches in diameter and 2.84 inches in depth. It is suitable for Boats, Yachts, Motorcycles, Motorbikes, Cars, ATVs, UTVs, SUVs, RVs, Golf carts, Campers, RZRs, Harvesters, Trucks, and more. Multiple Entertainment Connection FM AM Radio Includes a USB 2.0 port and a 3.5 mm auxiliary input for MP3 players, phones, and USB flash drives up to 32 GB. The FM/AM marine stereo stores 18 FM presets and 12 AM presets for quick access to favorite stations, realtime music, news, and traffic updates. Use scenarios On a boat or yacht: stream lossless or music via Bluetooth, adjust EQ settings to suit the deck environment, and enjoy powerful audio with the 4x50W amplifier. In a vehicle or camper: connect a USB drive or pair a device via Bluetooth for onthego entertainment, while using the FM/AM radio to catch updates and music. In offroad or outdoor setups: leverage the 12V DC operation and rugged IPX5 construction for reliable audio in challenging environments, with easy mounting in areas requiring a 2.89 inch diameter by 2.84 inch deep cutout.