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