1. Material: ABS+PC silicone button
2.USB1: QC3.0 quick charging port
3.USB2: usb disk / 2.4a charging port
4. Battery voltage detection
5.FM transmission
6.TF card/usb flash drive music playback
Voltage: DC12-24 V
Output current: USB1: 3.6-6.5V /3A
6.5 V and 9 V / 2 A, 9-12 V / 1.5 A
USB2:5 V / 2.4 A
7. Bluetooth version: V5.0
8.FM frequency: 87.5-108mhz
9. Capacity: USB flash drive /TF card < 32G
10. Audio format: MP3/WMA/WAV/FLAC
11. Bluetooth distance: 5-10 meters
12.FM transmission distance: 5 meters