Power On Board Powerful 450 AMP Jump Start/Air Compressor with Built in Automatic Charger Built in charger (no more lost adapters). 12 volt DC portable power supply. 120 PSI air compressor inflator 450 amp instant starting power. Built-in emergency area light Charging and battery status indicators. 22 inch heavy-duty cables 15 inch air compressor hose. Rugged, weather-proof, unbreakable housing Automatic charger prevents over-charging during AC recharge