Portable Power Inverter (220-0138) Features Faxback Doc. # 19629 Your Radio Shack Portable Power Inverter converts 12-volt vehicle battery power into 220 watts of 115 volts AC power. You can use your inverter to operate a TV, VCR, portable computer, a household appliance, lights for emergency or campsite use, power tools, etc. The power inverter works with the vehicle engine turned either on or off. It provides a continuous output of up to 220 watts, sustains a temporary output of 300 watts for approximately 5 minutes, can "cold start" a load up to 400 watts, and provides the 600 watts (1 cycle @ 60 Hz) of surge start-up power required by most personal computer monitors and TVs. (EB 2/12/96)