A fan doesn't help you _feel_ cooler, it actually helps cool your body by increasing air circulation and thus improving the rate of heat exchange. This device,

A fan doesn't help you _feel_ cooler, it actually helps cool your body by increasing air circulation and thus improving the rate of heat exchange. This device, OTOH, is explicitly intended to trick your body, potentially compromising its internal defenses against overheating. OP's comment wasn't about being negative or knocking someone else's hard work; [s]he's simply pointing out what appears to be a very real safety concern in the system that needs to be addressed. Your suggestion that preventing electrocution on a device presumably powered by batteries is more safety-critical than this seemingly very real health risk that affects large parts of the world is, quite frankly, ridiculous.