Fear The Hand

Swiveling on a bearing and attached to the back using a convenient strap harness, this robotic arm reacts to the subtle vibrations produced by flying mosquitoes and gnats and makes a valiant effort in slapping the area of your body where the insect is heading.

Accuracy is rather less important here than vigilance, with the hope, as described in the related article, that human hunting mosquitos would be extinct within a few generations.