Duracell Powerpack Pro 1100 Jumpstarts 4, 6, and 8 cylinder vehicles with built-in heavy duty jumper cables - 1100 peak amps Includes 2 AC outlets with up to 300W of combined available AC power, two 2.4A USB ports, one 12V DC outlet, a 160 PSI air compressor to inflate tires, and an emergency LED light AC cord and inflating needles are included in the built-in compartment underneath handle Safety Features: Reverse polarity indicator; Alarm to help prevent incorrect jumpstarting connection; Inverter overload/over-temperature & short circuit protection; Follows ETL safety standard Recharge unit every 2-3 months  It is also recommended to recharge unit after each use so that the internal battery remains at full capacity