I bought these because I needed a mini air pump for KLR650 trips around Alaska. I was immediately disillusioned with this. The air pump motor is not protected at all and has very weak solder joints. It's like what a fifth grader did for a science fair. I almost electrocuted myself the first time I used it, and then almost burned myself when I chased it. This product is cheap chinese junk, do not buy. Take one of the stop and go's, it has a real case, buttons and dial. everything this piece of junk doesn't have.