Source Type:FM,AM,Bluetooth Enabled Marine Radio. Input Types:Bluetooth, USB,AUX. Outputs:1 pair RCA Pre-Amp Out,One Way Input Support RCA subwoofer audio output. ID3 Tag Song Readout and Power-off Memory is supported. Ideal for:Car,motorcycles,yacht,fishing boats, cuddy cabins, ski boats , the unit is also perfect for spa pools, quad bikes, golf carts,UTV,ATV and RV. Electrical Specifications Operating Voltage:12V DC(10V-15.9V allowable) Standby Current Draw:5mA Fuse Value:15A Audio Outputs/Inputs Output Channels:4 stereo pairs of RCA plugs Maximum Output Voltage:Absolute:2VRMS Input Channels:1 stereo pair of RCA plugs Tuner FM Tuner:87.5 MHz to 107.9MHz (0.2MHz step) AM Tuner:530kHz to 1710 kHz (10kHz step) Bluetooth Profle:A2DP USB 2.0 Maximum Current Output:1A Supported Audio Formats:MP3,WMA,FLAC,AAC,APE Colour:As Shown Material:plastic Package Contents: 1 x Marine Stereo Boat Radio(Due to different product batches, the appearance may vary, which does not affect the use) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.