Features: 1.4 Levels: The rechargeable desk fan has four fan speeds, giving you more choices in different temperature environments, and you can easily check the battery level with the LED power display. 2.Long Lasting Battery Life: The USB portable fan has a built in 5000mAh large capacity battery, which can run for 4?11 hours after a full charge, suitable for office, home and out of home use. 3.Low Noise: USB small desk fans use an upgraded version of the silent motor, the latest power technology, the noise is less than 25 decibels, the motor runs quietly and stably, providing continuous wind. 4.Shaking Design: 5000mAh desktop fans can rotate automatically, support 180 automatic shaking head, and can also manually adjust the up and down direction, allowing you to enjoy the cool wind anytime, anywhere. 5.Easy to Clean: The rechargeable desk fan can easily remove the front cover to clean the fan blades, built in optimized PCB chip, can provide charge and discharge protection, over temperature protection, etc. specification:Item Type: USB Small Desk Fans Material: ABS Product Size:Approx. 170 x 106 x 226mm / 6.7 x 4.2 x 8.9in Input: 5V / 1A Maximum Power: 4W Level: Four Levels Adjustment Shaking: Support 180 Automatic Shaking Charging Interface: Type C Built in Battery: Lithium ion Battery Battery Model: 18650 Battery Capacity: 5000mAh PackageList:1 xUSBSmallDeskFans 1 x USB Charging Cable 1 x Chinese English User Manual NoteShips with built in battery.