Review on Schumacher 750W AC to DC Digital Power Inverter for Cars - Convert Vehicle Power to Household Power Efficiently by Brian Cooper

Here they are: 1) The unit is LOUD, like an acid metal orchestra. stoned at the last concert of the tour - when the power is about 50 watts or more. 2) "Low Power Shutdown" has two problems: A) it shuts down too quickly and easily; I couldn't tell exactly where it turns off, but at that voltage level it only takes a moment to turn off (for example: if something turns on in the truck that the voltage drops for a second, this thing is working). B) No restart - after a power failure, it will NOT restart when the voltage returns to normal. You have to turn the device off and back on to start it again (awful if you're driving and the device is being used to charge your laptop).