Uses a switching circuit that is compact yet continuous at 20 A and has a maximum of 22 A intermittent capacity. Automatic power on and off feature with ACC position detection backup that can be used with a variety of car electronics devices with DC 12V ratings such as car stereos and car navigation systems. Support constant output of 1A when power off, current up to 15A when power is on. The main army terminal, cigar socket (up to 10A) and 2 USB type connectors that can take 2A separately from those on the front panel for easy connection. The thermal sensing fan and automatic output shut-off at high temperatures, overvoltage output using a relay, automatic current limiting type overcurrent, and short circuit protection. Input/output terminals are attached to the back for navigation and stereo illumination.