Working Time: Once charged for four hours this fan can work for 4-12 hours. Fans: Get a portable fan with a power bank. Colours: White, pink, blue, or black. Power Bank: Also includes a power bank so you can charge your phone on the go. Size: 162mm x 80mm x 17mm. Portable: This fan is handy to have with you on the go during hot summer days. Portable Fan | Living Social | Living Social