Not worth the money i used it and the fan moves but doesn't help with the foging up on glasses or goggles, it has one fan and u have to tap the battery for it to kinda work and i used it in a light rain and it stop working a couple of times its a waist of money and time.
First of all this fan does not defog the goggles. Second of all its EXTREMELY loud, I couldn't hear anything but the fan. I would not recommend this product at all.