This Portable Jump-Starting Pack and Air Delivery System take versatility to a new level! Compressor can fill four passenger tires on a single charge and fills one tire from flat in under 8 min. Includes a built-in pressure gauge and 12’L coiled air hose with screw-on chuck for ease of use. To jump start, connect the red clamp to the positive battery post and black clamp to a ground. Then, turn the key of the disabled vehicle. Model JNCAIR. 12V DC.WARNING! This Jump-Start Pack must be fully charger prior to use. Versatile: Combination jump-starting pack and air compressor Convenient: Industrial grade air compressor can fill four ties on a single charge. Reliable jump-starting without using your vehicle’s battery Durable Construction: Heavy-duty case is designed to withstand the rigors of everyday use Prevents Overload: Automatic circuit protection prevents overloads 1700 Peak Amps 425 Cranking Amps Clore PROFORMER battery technology Extra-long 68″ cables Industrial grade Hot Jaw clamps Built-in charger Automatic charging 12 ft. coiled air hose with screw-on chuck Voltmeter provides charge status of onboard battery 12VDC outlet to power accessories 1 year limited warranty