Car Radio MP3 Player Bluetooth FM Remote Control 4 Channel Audio for Vehicle Driving 5513 Item Type: Car Radio Model: SX 5513 Voltage: 12V Type: On Board MP3 Software Solution: 4900 Panel Light: Blue Radio Band: FM Radio Chip: QN8035 Power: 55W Working Temperature: -10 ~ 60℃ Bluetooth Model: Version 4.0 Power Amplifier Chip: TDA7377 Radio Frequency: FM 87.5~108MHz Memory Card Slot: Large memory card slot. USB Interface and Version: USB 2.0 interface. Key: Physical Key RCA Terminal: 4 way RCA output with red and white jack. Front AUX Audio Input: Yes Supported Audio Formats: MP3, WMA, WAV, FLAC. Basic Functions: 1. FM Radio. 2. Read the audio on card and USB flash disk. 3. AUX function. 4. Bluetooth function. 5. RCA audio output can be connected to subwoofer. Battery Type: 2 x AAA battery for remote control, not included.