The USB Powerfan Desktop fan is a great corporate present is an ultra-quiet third gear speed 4-inch mini fan perfect for office desktops. Use an adapter with a power input of 5V-1A to get the maximum benefit. It is available in 123x123x50 mm size and comes in white, blue and pink colours. Being extremely lightweight at 169 g, it can be carried easily and anywhere you are working and enjoy the cool breeze from the fan. This USB fan can rotate freely and can be oriented in different directions. It can be charged using a computer, power bank or mobile chargers and operates without a battery.