Connected to AC 100~240V 50/60Hz household current and convert into DC 12V 10A power with a total long 254cm ( 8.3 ft) power cord to reach a wide range. Allows car devices to be used at home or anywhere you want.. Work perfectly with most of car powered devices under 120W, such as car GPS system, car vacuum cleaner, car refrigerator, car massage cushion, car air pum compressor/ inflator, car cooler/warmer, and so on.. High Efficiency & Reliability, Automatic Overload Cut-off, Automatic Thermal Cut-off, Short Circuit & Over Voltage Protection, Low Interference & Noise.