Portable Wireless & Rechargeable Desk Lamp : The desk lamp has a built-in 5200ma battery, which is rechargeable. When the battery is fully charged, it can be used for 12-60 hours at a time without plugging in. It can be placed anywhere and is very convenient. Intelligent design, no wires, let you take it anywhere. The color change lamp is the best decoration of the party, candlelight dinner. you can even travel, camping.