1. Material: ABS+PC 2. Working voltage: DC12-24V 3. USB1 output: 4.5V/5A, 5V/4.5A 9V/3A, 12V/3A 4. TYPE-C output: 5V/3A9V/2.22A, 9V/3A12V/3A (24V input only: support 15V/3A20V/2.25A) 5. USB2 output: 5V/1A 6. Transmission frequency: 87.5-108.0MHZ 7. FM transmission distance: 5 meters 8. Bluetooth version: 5.0 9. Effective distance: about 10 meters 10. TF card U disk capacity expansion: 32G (not included) 11. Audio format: MP3/WAV/FLAC/APE/WMA 12. Support: connect 2 mobile phones at the same time 13. Applicable models: universal for 12V-24V models 14. The digital display screen detects the battery voltage in real time 15. Compatible with various navigation software, easy to operate 16. Power-off memory function, memorize frequency, track resume playback after power-off restart 17. Built-in high-sensitivity microphone, clear and smooth calls 18. Dimensions: 43x48.5x84.5 mm