General description This 4000mAh Handheld Fan is a versatile mini portable fan that can be used as a handheld device outdoors or as a mini desk fan on a flat surface. Its larger battery capacity of 4000mAh allows for extended use, making it an essential accessory for summer activities such as commuting, traveling, shopping, or picnicking. Technical specifications Battery Capacity: 4000mAh Working Time: Speed 1 (20 hours), Speed 2 (15 hours), Speed 3 (5 hours) USB Rechargeable: Compatible with USB charger, car charger, or computer Installation Before use and charging, ensure to turn on the anti-trigger switch located at the bottom of the base. Usage One-button control: Short press to turn on the fan, press repeatedly to adjust wind speed or turn off. Other information Features a removable cover for easy cleaning. Includes a non-slip mat at the bottom for stability when placed on a table. Compact size for convenient carrying in a bag.