Herdio Weather-proof Marine Stereo, Boat Gauge Audio In-Dash, Bluetooth. Description: This waterproof marine stereo radio receiver is great for application where limited space is available. Even though it is only gauge size, it can still power up to 4 speakers with 40 watts (peak power) per channel. Features: Wirelessly Built-in Bluetooth This stereo has no CD player, but has the ability to stream your audio wirelessly. Built-in Bluetooth technology allows you to instantly play music via your smart devices– quickly and easily! (like iphone, android, smartphones, ipad etc). 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). LCD Display: The audio screen with high definition positive LCD display and the bright LED illumination button when connect the power. Waterproof and Anti-Rust: Hit the water and enjoy your music with the Herdio marine gauge stereo. Easy installation: This 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. Installation Dimensions: (W x D x H): 3″ x 1 5/8″ Widely Used: Ideal for ATV, UTV, Motorcycles, small fishing boats, cubby cabins, ski boats and PWCs, Spa pools, quad bikes, Golf cards, TVs and RZR. Power Output: 40W X 4 channels; 40 Watts x 4 Amplifier, Balance/ Bass / Treble. Round/Circle Design Marine Stereo Receiver Radio System with Bluetooth Wireless Music Streaming. Waterproof IPX6; Anti-Rust: ASTM 117 salt/fog standard. Cutout Space required: 1 5/8 inch(Depth, not including wires), 3 inch(L/W). We are regarded to welcome you as an unwavering client. We will give you an astounding item with the best price. We are satisfied to offer greatly top notch items. You’ll discover our items are ensured to go well past your desires! Thank you for shopping with us!