TrendBox Mini Portable USB Rechargeable Fan 3-Level Speed Adjustable Electric Cooling Laptop Computer with LED Light - Blue Support 3-level speed for adjustment Come with a bright LED light on one side (Holding 3 Seconds to turn off) Powered by one removable 18650 rechargeable Li-ion battery (NOT Included) Can be directly connected to the host computer or laptop USB port Mini portable size; Super strong wind