Specifications JSD-520 Bluetooth type Panel size: 188 x 150 x 58mm (width * depth * height) Installation size: 178 x 150 x 50mm (width * depth * height) Quantity: 1 piece Power: 24V Maximum. Power output: 60W4 FM frequency range: 87.5-108.0MHZ Backlight: Blue English manual: Yes Bluetooth connection method: Turn on the phones Bluetooth function, Search and connect "CAR/btmp3" item, Enter the password "0000" (if required), Press the MODE button to enter the Bluetooth function, You can use the MP3 player. Wiring guide: Installation method: Please do not power on the machine before wiring, Otherwise, the machine will be damaged. 1. Connect the yellow wire to the positive electrode of the battery, Black negative electrode. 2. Connect the red wire to the car key ignition. 3. If your car has any Subwoofer or external antenna, You also need to connect the blue wire. 4. The blue line of other models Wrap it with tape. 5. The speaker has positive and negative poles, Connect by method. Package included: 1 X Bluetooth MP3 player 1 X remote control 1 X cable 1 X English manual 1 X packing box