Features: 1. Small and exquisite, easy to use. 2. Colorful atmosphere lights make driving more romantic. 3. Bluetooth, U disk (up to 32G) audio connection. 4. Support power-off memory playback function. 5. High-resolution, high-performance stereo, lossless music playback. 6. Bluetooth version 5.3 supports Bluetooth audio playback and Bluetooth hands calling. 7. 22.5W Super fast charging, charging while listening to songs. 8. The voice navigation function supports 99% of map applications. 9. Full-frequency FM wireless transmission technology, which can directly read audio files on Bluetooth mobile phones/U disks. 10. Multiple protections such as over-current, over over-temperature, over-voltage,short-circuit protection, and anti-combustion make it safer to use. 11. It is suitable for ALL cars, SUVs and trucks with a voltage of 12V-24V. Specifications: Model: C4 Material: ABS Color number of atmosphere lights: 7+1 mode Bluetooth version: Bluetooth 5.3 Charging interface: USB 15W Type-C 15W USB1 interface: 5V/3.1A USB2 interface: 5V/1.5A Type-C interface: 5V/3.1A Working Voltage: 12V-24V File type: MP3/WMA/WAV/FLAC/APE Transmitting frequency: 87.5-108.0MHz Functions: U disk, AUX in, FM, Bluetooth music, voice navigation, dual USB fast charging,hands calling, etc. Size: 4.9 x 4.9 x 8 cm Model: C4S Material: ABS Color number of atmosphere lights: 7+1 mode Bluetooth version: Bluetooth 5.3 Charging interface: USB 22.5W Super fast charging+PD 30W 22.5W interface: 4.5V/5A,5V/4.5A,9V/2.5A,12V/1.8A PD interface: 5V/4.5A,9V/3A,12V/2.5A Working Voltage: 12V-24V File type: MP3/WMA/WAV/FLAC/APE Transmitting frequency: 87.5-108.0MHz Functions: U disk, AUX in, FM, Bluetooth music, voice navigation, dual USB fast charging, hands calling, etc. Size: 4.9 x 4.9 x 8 cm