Hand Fan Battery Powered, 4000mah Double Blade Portable Mini Fan Usb Fan Rechargeable, Powerful Wind, 3-speed, Lanyard Fan Compatible With Offices, Ho Double Blade & Double Motor: New spiral double layer fan blade & double motor design, double wind is more concentrated, can break the airflow evenly and tightly, promote air circulation, strengthen the air convection speed, thus achieve strong wind power, let you feel the ultimate coolness.Portable Silicone Lanyard: This double-bladed fan is not only small in size, but also equipped with a silicone lanyard, which makes it easy to carry and store. It can be held in the hand, put in a backpack and also placed hanging. Hanging the lanyard on your wrist when holding the fan can also prevent the fan from slipping out of your hand or accidentally getting lost.Three-speed adjustment and long working time: One-button control of wind power, easy operation. The wind is divided into three different wind speeds: low / medium / high, so you can control the wind as you like. After fully charging, 1st to 3rd gear can last about 9 hours, 4.5 hours and 3 hours respectively. Long battery life, permanently cool.USB power connector with high compatibility: The portable mini hand fan has a built-in 4000 mAh battery and can be used wirelessly. Universal Micro interface compatible with USB charging ports, adapters, mobile power supplies, computers and other devices.