Promotional Fans, Mini USB Cellphone Fan - Universal Compatible & Safety Protected, Plugs into your smartphone. Inner plug is a 2-in-1 plug (Micro USB + Lightning) and the outer plug is a Type C connector. Immediately activates to cool you off. Powerful and soft blades move with quiet operation. Works with most newer Apple, Samsung and Android smartphone devices. Includes a diode which prevents voltage from being kicked back from the fan, thereby protecting the device. This is a very important safety feature some lower cost fans do not have. Some phone cases prevent the fan from plug ... #T202B $3.60/each.