We discount for large quantity. Welcome to contact with us led flashing, Display for temperture and Time unique shape and bent freely suit for laptop,desktop PC soft foam blade safty to body Powered by usb port mini shaped make you easy-to -carry quite and noiseless not disturb you work make you feel more confortable at work Tips: The usb fan work with DC 5V and 330mah power , dont let it working with power bank and wall charger above 5V and 330mah . Fan Diameter: approx. 88mm Colour:silver Material:metal Size:10*5*2CM Package Contents: 1*USB charging clock fan Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.