Heat transfer vent for proper heat dissipation for safe operation and long life. 10 feet long wire for sufficient reach. Hassel-free operation:Portable and easy operation 4.5 x 5.2 x 1.8 inch compact size for easy storage and operation, just put the air compressor tyre inflator plug directly into cigarette lighter socket of your vehicle. Powerful: Can inflate without the need to put the car on jack.