A desk fan is a small enough load that USB power is enough, which means it runs from a laptop, a power bank or a phone charger without another plug on the strip. The cooler models pass air over a damp filter so what reaches you is a few degrees below room temperature rather than just moving the same warm air around. By shipping directly from our manufacturing partners, Blacksheep brings desk cooling home at up to 60% off standard retail prices. Read less