This cobalt works well and has some nice features. However, one of the reasons I bought it was to use 12 volts. I couldn't connect to my Chevy Suburban, Dodge Truck, Hyundai, or Tractor. I went back and looked at the reviews again and found that some of the other reviewers had the same issue which I had previously overlooked. So I had to either send it back and start over or buy an adapter. I found an adapter that works but still fits snugly. If you only use 120 that's great but you may need an