(like iphone, android, smartphones, ipad etc). WATERPTOOF and ANTI-RUST: Hit the water and enjoy your music with the Herdio marine gauge stereo. EASY INSTALL: 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. What is the package: Headunit x 1PCS+ Marine Speakers x 1Pair+Instruction manual. Marine Audio Stereo System kit. This audio package comes complete with 4″ marine digital media Bluetooth receiver, an auxiliary interface mount to convert your AUX inputs to USB, The 4″ marine stereo includes a set of rear-mounted preamp outputs, so you can expand your system with a marine amp in the future. The LED display tells you what you’re listening to with just a glance, while the watertight, UV-stable face and controls will stand up to sun, salt and moisture when you’re riding the waves. Take your marine vehicle’s sound system to the next level with this marine stereo bundle, put together for high-performance, durability, and ease of installation. Herdio 4 Marine Digital Media Bluetooth Stereo Receiver. This digital media receiver packs with compact design that fits into a standard tachometer opening. You can also use the rear aux input for your music player, or plug a thumb drive into the rear USB port to enjoy your favorite music files. Herdio Marine Box Speakers weather-resistant material allows you to ride through the sea and Oceans on your Boat without worrying about the harsh outdoor environment. All parts needed to install your marine audio system are included. Please wait for the result of cancellation. The order will be processed and completed by automatic warehouse system within 5 minutes. Sending direct message to cancel the order is not allowed for every case. Any product you return must be in the same condition you received it and in the original packaging. Please keep the receipt. We usually respond within 24 hours on weekdays. Thank you for shopping at our store.