1. Material: aluminum alloy, plastic, electronic components 2. Input voltage: DC12-24V 3. Suitable for a variety of cars 4. Adopt fireproof shell, fireproof and flame retardant, sturdy and durable 5. Intelligent control chip, multiple protection 6. Built-in intelligent identification chip to automatically match the current required by the device and reduce losses 7. Anti-skid shrapnel on both sides, three-point integrated buckle design, no fear of bumps 8. Dimensions: 7.4 x 3.46 x 3.46 cm 9. Weight: about 50 grams