Awei F23 Mini Portable USB Rechargeable Desk Fan: Small and lightweight, perfect for portability Built-in 4000mAh battery for up to 18 hours of run time Four different speeds 360-degree head for adjustable airflow Rechargeable via USB Model: Awei F23 4000mAh large capacity Charging time 2-3Hours, Backup 3-18 Hours (Depends On Speed) Low-noise fan 4 speeds Color: Black Here are some of the benefits of using the Awei F23 Mini Portable USB Rechargeable Desk Fan: Keeps you cool on the go Portable and lightweight Long battery life Adjustable airflow Rechargeable via USB If you are looking for a small, portable, and powerful fan to keep you cool on the go, the Awei F23 Mini Portable USB Rechargeable Desk Fan is a great choice. It is easy to use, has a long battery life, and can be adjusted to your desired level of cooling.