Very convenient to connect devices up to 1000W on a simple car battery. Comes with lugs to connect directly to the battery and enjoy the 1000W, and car adapter for low consumption (about 150W depending on the car - check the value of your fuse: 10A = 120W, 180W = 15A, 20A = 240W, beyond you could melt it), convenient to connect laptop while driving.
Reliability problem on the first received model. Traded free Amazon, and no problems with the second, used for several weeks of work: lights, grinder, drill, he did not flinch!