The Black & Decker Electromate 400 Portable Power Supply (model VEC026BD) is both cordless and rechargeable for use outdoors and in case of emergencies and power failures. It combines a 450 Amp jump-starter, 120 PSI inflator, 400 Watt power inverter, and alternator voltage check in one - handy to have around in any situation including flat tires and vehicle breakdowns. Detachable heavy-duty clamps and cables are included with this portable power supply pack, along with a three-piece adaptor nozzle set and 12 Volt DC car cord. Other features of the Black & Decker VEC026BD include a long-life LED emergency worklight for practical night time use, a power safety switch and reverse hook-up warning, and back-lit air pressure gauge for use with the inflator function. Always be prepared with the Black & Decker Electromate 400 Portable Power Supply pack.