3000mAh Battery CapacityUpgrade mini fan obtains a 3000mAh battery not only provides powerful energy for fan blade,but also could charging your cellphone in case of emergency. 3 Wind SpeedsPractical one-key operation USB mini fan, simple and convenient. 3 gears:softnaturastrong, choose the speed according to your favor by press the key switch. Handsfree DesignAttatched a strap that can be tied on both sides of the base of mini fan, When shoppinghikingplaying on beachtravelingetc.. Hanging it on neck and it'll brings you a cooler summer. Cellphone HolderEmbedded 90 cellphone stand with a 270 rotation head's design make it possible to hold your phone and adjust the wind direction .Buy this Mini fan, and you'll find what is convenience. Operation Instructions1. Before the first use, we suggest charge this mini fan for 2 hours 2. As the built-in battery , please do not use this mini fan in places with excessive humidity or high temperature(<104). 3.To ensure the life of the motor,please do not use the fan while charging the fan. 4. Children under 10 years old need adult care when using this product.