1. Material: ABS + silicone + inner braided inflatable tube + aluminum alloy. 2. Surface technology: texturing + polishing. 3. Sizes: 105*150*50mm. Weight: 600g. 4. Maximum battery life: can hit 2 215/55/R18 car tires. Battery capacity: 2500mAh. Type-C interface input. Charging time is about 4 hours. 5. DC brush motor, 22-cylinder movement, maximum air pressure ≤3.5bar. 6. Support four modes: car, motorcycle, bicycle and pumping gas-filled balls. Not applicable to large trucks.