Now you can add Bluetooth connectivity for any audio system with the easy-to-use DS18 Round Marine Waterproof Universal Bluetooth Streaming Audio Receiver with Functions Control for Android or iPhone. Many applications leave little to no room for large, bulky head units, or they sometimes come with no source output at all. This DS18 Bluetooth receiver will send out signal to your amplifiers and also give you control over the music being played via Bluetooth without having to fumble around with your phone, so you have fewer distractions. It mounts easily without taking up a lot of space. Multiple outputs to make it connectable to most amplifiers and devices. Aux input and a USB port give you even more audio possibilities. 1A USB charging keeps your device charged while streaming, giving you the ultimate way to modernize virtually any system. Adds Bluetooth wireless connectivity to practically any audio system Mounts easily without taking up too much space Multiple outputs to connect to most amps and devices Aux input and USB port for even more listening possibilities USB device charging to maintain battery while streaming