ETONG Mini 3-inch Pocket Fan Electric Personal Fans 3 Speeds Portable Mini USB Rechargeable Portable Table Fan with Built-in Battery 3 Adjustable speeds: Adjust among low, medium, high according to your demands. While it keeps low noise level even at the highest speed. With side LED lighting function: Long press the GREEN key to turn on the side light for emergency use. Powered by built-in rechareable 2200 mah battery. Note: Please fully charge the fan before fisrt use. Charging Way: you can connect the fan with USB cable to power bank and computer or any USB outlet , or using a adapt for wall charging. Very Mini and light weight; only 163g (Built-in battery included) Ideal for travelling, jogging or sun bathing also an be used in office or Car etc.