1. Shell material: ABS 2. Case material surface technology: fine grain, high gloss 3. Input: 12-24 4. Hardware function: FM transmitting, Bluetooth, USB charging, U-disk reading, colour light, EQ function 5. Output: 5V-1.5A or 5V-3.1A 6. Total power: 7.5-20W 7. Output port type: USB, type-c 8. Protocol: Bluetooth 5.0 9: Weight: 35g 10. Dimensions: 78x48x48mm 11. Package: color box