Totally overlooked the part that has no function unless plugged into the car's 'cigarette lighter' Harbor. It boasts that it is suitable for bicycle tires, air mattresses and other small inflatable boats - that's why I got it. But where the hell can I find a lighter adapter to inflate a cabin bed or a bike tire in the garage? He also says he has a built-in flashlight for emergencies. Serious? So I have an emergency like a dead battery and this thing is going to be a better flashlight than my phone. Does not happen. Pure waste of time and energy for this. If you just want to use it in your car to test tires with a power cord pulled out of your car window then it's perfect. However, note that the cable is short and comes with ONLY a car adapter - no power adapter. Maybe it wouldn't be so bad if it had a regular plug.