Review on iMBAPrice Classic Hi Speed 4" USB Mini Desktop Metal Fan – Black: Efficient Cooling for PC/Laptop by Jason Guzman

These are great little reusable fans. I ordered two of these, gave my wife one for office/desk use when the AC went off, and kept one for camping in a tent. You can connect it to a small USB battery pack/charger or portable car charger/jumper with a 12 volt USB adapter plugged into a 12 volt cigarette lighter outlet on the jumper and it will last almost forever. You can also remove the small stand if you wish and place it face down with the mosquito net in the attic on top of the tent. It has enough airflow/air circulation to make sleeping in a tent more bearable during the warmer months, and much better than so-called "tent fans" that run on batteries. Because this fan has a metal construction, it is much stronger than plastic tent fans. Put a dab of superglue in the three little rubber feet when attaching them so they don't fall off or get lost. I highly recommend.