【Versatile Car Audio System】This multi-functional car audio player combines Bluetooth connectivity, USB playback, and FM radio for a complete in-car entertainment solution 【High-Quality Audio Output】Featuring RCA audio output, this device supports connection to subwoofers, ensuring rich, immersive sound quality for your driving experience 【Multiple Playback Options】Enjoy music from various sources including USB drives, memory cards, and AUX input, providing flexibility for your audio preferences 【Smart Features】Equipped with a temperature display function, this unit keeps you informed about the ambient temperature while on the road 【Convenient Charging】The built-in USB charging port (1.5A) allows you to keep your mobile devices powered up during your journey Specifications: Software solution: 6639 Radio frequency: FM 87.5~108MHz AM 522-1620KHz Radio IC: 4730 Power amplifier IC: CD7388CZ Output power: 60Wx4 Operating voltage: 12~14.4V Operating temperature: - 10~60℃ Bluetooth version: 5.1 (default name: CAR BT) Installation size: 178x50mm Surface shell size: 188x58mm Host depth: 90MM Front USB: 2 USB ports, 1 charging, 1 USB 2.0 reading TF card: support (not included) Reset button: support Audio output: 4 channels (2 left channels + 2 right channels) Audio input: front AUX input (left channel + right channel) Audio format: MP3/WMA/WAV/FLAC