The Schumacher IP-95C Jump Starter has a built-in high-pressure air compressor and DC power source for 12-volt accessories and 5-volt USB devices. The maintenance-free, sealed lead-acid 9 ampere hour battery allows storage in any position. Compact and lightweight with a durable and corrosion-proof polypropylene case. Easy-to-read battery status LEDs tell when the internal battery is at Full Power, 75% Charged or 50% or Less and needs to be recharged. Built-in charger for automatic charging of internal battery, with LEDs indicating Charging or Charged. Safety features include: On/Off jump-start switch that eliminates accidental clamp shorting; reverse-hookup protection with alarm warning; and overload and short-circuit protection on the 12-volt accessory outlet. Sure-grip clamps fit both top and side-mount batteries, and the 18" cables stay flexible in cold weather. This is the best choice for your portable power and air needs!