LIGHTINGVIEW(TM) Mini Reading LED Lamp, 2 Heads by 2 Flex necks, Clip On Music Stand, Table, Bed, Computer, For Kids, Adults, White In 4 Brightness, by USB or 3 AAA batteries(Batteries NOT included) POWER SAVE: Total power consumption only 0.32W, but have enough brightness for reading ENJOYING READING AT NIGHT without disturbing others by easily change the direction of light FOUR DIFFERENT BRIGHTNESS dimmable to meet your requirement on the light emitting PORTABLE AND EASILY POWERED by 3pcs AAA batteries or USB cable(USB cable included but Batteries NOT included) 30DAYS REFUND WARRANTY! We have confidence on our lamps! If you think any point of the product can't meet your requirement we can give you refund 30days after you bought