NOTE: This Marine radio is power on by DC 12V. And just to make sure the red and yellow wire connect to the positive pole and the black wire connect the negative pole

Waterproof and anti-dust: The marine stereo and 4” Black Speaker with an IPX6 Rating and ASTM 117 salt/fog standard, state-of-art weatherproofing materials and UV coatings, this tiny radio is protected from the elements.

RCA AUX AUDIO INPUT: USB/ MP3 PLAYER: It also will play your digital MP3 files when you connect your MP3 player or flash drive to rear USB port (MP3 player also can be recharged) Install it has an AM/FM radio and RCA AUX audio inputs on the rear which can be used to play the audio from ipods,portable satellite radio, etc

Installation Dimensions: Marine Stereo Reciever specifications: Diameter 3.5 inches, Mounting depth 1.6 inches, Mounting hole cutout: 3.1 inches. 4" speakers Maximum handling 160 watts(Pair),The outside facial Diameter is 4.88” with Mounting Hole Diameter: 3.8”, and Mounting Depth:1.38”.

Built-in Bluetooth: This stereo receiver built-in Bluetooth technology ( no CD player) allows you to instantly play music via your smart devices-- quickly and easily! but has the ability to stream your audio wirelessly.

Package contents 1 PCS x Marine Radio 2 PCS(1 Pair ) x 4 inches Marine Speaker 1 PCS x Radio antenna