If you are an electric gadget freak that rides a motorcycle you are bound to run into problems on the road. Lights don't work, GPS loses power, cell phone adapter doesn't charge your phone, etc... You just never know what might come up. This handy little 12 volt probe takes almost no space and is great for finding out where you have power and where you dont. The thing only costs about 7 bucks at Wallmart. Ironically, it was the only special tool I pack on our trips and I had to use it during our Wingding journey. That one use alone was worth every cent.