The light arms adopt quality metal alloy material with high flexibility and hardness, can be set in any position and adjusted to the required angle and shape, providing a full range, multi angle choices for lighting. Multiple Power Supply Modes: the book lights for at night in bed have multiple power supply modes, including AAA battery operated or USB cable In the power supply state, can be directly inserted into DC plug to replace the power supply, and the battery power will be automatically cut off without removing the battery When being removed from the plug, the battery is powered on, simply press the button again The package doesn' include battery(three sections). Meet Your Multiple Needs: the LED lights attached to the battery operated clip on lights are as bright as 3 common LED lights The switches on the dual arms can be done with a light on, a light on both arms, two lights on the single arm, and all lights on the double arms, have no flicker, shadow or with the design for , meeting your multiple needs Adjustable Clips: the rechargeable night lights with adjustable clips can grip objects of different thickness There is a small part equipped on the clip tail that can be turned independently, which increases the scope of clamping objects and makes clips firmly clamping on items Wide Purposes: the rechargeable book lights are suitable for music stand, book , piano performance, orchestra, music performance, work table, computer, also appliable in knitting, sewing and craft situations, practical and versatile, you can carry around for travelling or at night in bed. Colour: Black Material: ABSandMetal Package Contents: 2 x musical score lamp Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.