Product description Color: Black Lampshade material: plastic Voltage: 36V Power supply: 3 x AAA batteries (not included) Size: About 23 * 21 * 1.5cm Package included: 1 piece * LED book light 1.Creative design: The new design of the light structure, the flat screen lighting, the precise design angle, the light is only illuminated in the reading position, particularly suitable for reading in bed, does not affect the rest of the others, the original design of the light barrier ensures that the remaining light is passed on to the no longer missing. 2.Easy to use: our flat screen night reading lamps are elegant styles, very easy to use, just place it on book and read, no other tools are required, ideal for nighttime reading; There's a switch button on the middle of black part, you can turn it on and off conveniently by pressing the button, easy and convenient. 3.Lightweight and portable: the LED book light is made of quality material, durable to last for a long time and lightweight for easy carrying, portable for reading paperback books and magazines on airplane, train, or backseat of car when travelling, or you can carry it on campus, parks, gardens, dark places to read and learn. 4.Size: each eye care reading light measures approx. 23cm in length, 21 cm in width, 1.5 cm in height, also suitable to be applied as a bookmark; Power: these LED reading light are powered by 3 x AAA batteries, not included in package.