QKILL 3 PECES OTG USB Micro Phone Fan 2015 Portable USB /Micro OTG Phone Mini Fan with Two Leaves Two Ports for Cellphone Samsung HTC Tablet Notebook (Random color!) Motor revolutions 16000 turn and can work continuously more than 100 hours Mini and small,portable; With fan function;Standard USB Interface Compatible with laptop, desktop, PC, and power bank Immediately work after connecting with USB port;Material: Plastic TPE blades Leaf width: Approx 2cm; Length: Approx 9cm