According to my experience this charger didn't work AS it should .It's supposed to be an anti-theft automotive accessory, but i never felt secure using it since it failed to charge regularly. The only pro I can mention is that the concept is good, but execution is terrible. On the other hand, the cons are many. It worked sporadically, and when it did, it was slow. It was also frustratingly complicated to set up, and the instructions didnt help much..See full review