Especially designed to stop the itching and reduce the swelling of mosquito bites, horsefly bites and jellyfish stings.
All you do is place the end of the device on the bite area and press the black activating button 5 times. A few minutes later the itching will stop. You can repeat if necessary.
It works by clicking a small electric charge into the skin which releases the endorphins in the body to counteract the itching sensation.
Some interesting warnings go with it, like do not use if you have a heart pace maker! Non-the-less Bob has always sworn by these devices and he is the one who always gets bitten, so he should know!
I can't tell if this actually works or relies on the placebo effect. I know some people swear by these, but I couldn't get the hang of it. It is basically a small piezzo like the ones you click on to ignore your has cooker. Feels fine when used on some fleshy skin. But on thin skin like a knuckle, it his a nerve