SWM RCA Audio Subwoofer 1 Din Car Stereo FM Radio Bluetooth MP3 Player with Remote Control Features: FM Radio: Support FM1, FM2, and FM3 three bands, up to 18 radio stations can be stored Suitable Models: Support USB/TF/MMC card reader, U disk(audio) Press the MODE button to switch the machine to AUX mode. When the phone is playing music, use the AUX audio cable to plug in both ends to play the phone's music Wireless Function: Turn on the mobile phone and use the wireless function to search for CAR-BT or bt-mp3, etc After searching, click to connect, enter 0000, and some can be used without a password Press the MODE button to switch to the BT interface, and then open the mobile player to play music. You can play mobile music Supports Active Subwoofer: RCA audio output can be connected to a subwoofer and supports an active subwoofer Support steering wheel remote control Specifications: Model: 1428 Voltage: 12V Type: Car MP3 Operating System: None Software Solution: 1900 Scre