The Olsenmark 2-in-1 LED Desk Lamp with built in Mini Fan comes with a rechargeable battery that supports a 5-hour fan and 15-hour worktime for lamp. The mini fan design creates a flow of air and makes you feel comfortable while working or reading. With the 3-level brightness modes, you can set the correct brightness as required.Easy to use and turn off in seconds, this modern lamp is the best choice for desk lamps. The built-in mini fan creates a flow of air and makes you feel comfortable while working or reading. The built-in 3.7V2200mAh rechargeable lithium battery can withstand long hours of uninterrupted work. With a micro USB cable, this wireless desk lamp can easily be charged with a power bank, computer, laptop, or any USB charging port/adapter. Flexible gooseneck with durable swivel head and housing for easy adjustment of the lighting direction. The Olsenmark Mini Fan Desk Lamp is perfect for all places like home, camping, caravan, study table, desk, and more.