This AMIR Book Light is made of 5500K LED which produces soft Eye-Care Lightning Source, flicker-free, anti-glare light without ghosting to relieve eye fatigue. The reading light is designed with 3 levels of Brightness. The smart touch sensor helps you get the right flow that does not affect your eyes. Made of Free Twisted Tube, which can be 360° rotated. As well as a Widened Clamp up to 5cm, making this lamp widely usable in many positions. Extraordinary Battery Life, built-in 1000mAh lithium rechargeable battery, which can work for 24 hours in dim brightness mode: 12 hours in medium light and 6 hours in the brightest light. Energy-saving and environmentally friendly. Constructed with a USB Cable, this book light is convenient to charge when it is out off power. It can be powered by a USB charger, plug and play, notebook PC USB, Mobile phone adapter, Car USB, etc.