Allweather marine design: IPX5 waterproofing with UV coatings protects against humidity and saltwater exposure. Built to withstand the marine environment while delivering reliable performance. Tachometerstyle integration: Standard tachometer gauge design with a required cutout of 2.89 inches (diameter) x 2.84 inches (depth). Suitable for Boats, Yacht, Motorcycles, Motorbikes, Cars, ATV, UTV, SUV, RV, Golf, Campers, RZR, Harvesters, Truck and more. Flexible entertainment options: USB 2.0 port and 3.5 mm auxiliary input allow easy connection to MP3 players, phones, USB drives (up to 32 GB), and other audio sources. FM/AM radio with 18 FM memory stations and 12 AM memory stations for quick access to favorite channels. Bluetooth wireless streaming: Bluetooth 5.0 with A2DP for stable wireless audio from smartphones, tablets, and other devices. Includes Poweroff Memory to resume playback from where you left off after power loss. Lossless sound and performance: Supports subwoofer output and 4x50 W amplifier power. Adjustable bass, treble, balance, and fader. Note: DC 12 V operating voltage; maximum power output is 4x50 W.