USB Rechargeable Folding Telescopic Floor Fan Mini Summer Mute Silent Student Desktop Table Fan For Office Bedroom School|Fans Feature: 1. Unique retractable and foldable design are easy to carry. It can be folded and extended as a desktop fan and can be extended up to 100cm as a vertical fan. 2. One-piece, expandable and foldable multi-function mini fan. It can work for 5 to 20 working hours on a single charge. Work quietly and without interruption while working, studying or sleeping. You can adjust 4 wind speeds. 3. The included cable can be easily powered via the USB port on a PC, laptop, mobile power bank or USB AC adapter. 4. It is very suitable for home, office and outdoor use. Specification: Product size: 19.7*19.7*9.3cm (folded) After shrinking: 36cm Stand up: 100cm Working time: 5-24 hours Charging time: 4-5 hours Noise decibel: 30-40dB Discharge power: 1.3-4.8W Charging voltage: DC5V/2A Working wind speed: 2.3-4.0m/s There are two kinds of batteries: 3600mAh Color: White, Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you Please allow 1-3cm measuring deviation due to manual measurement.