Specifications: Color temperature: 3-stage color temperature switching, stepless brightness dimming Maximum brightness: 50 lumens Three-stage adjustable temperature: 3000K-5500K-4500K Power supply: 250MAH ternary polymer lithium battery Lighting time: about 3 hours Charging time: about 40 minutes Indicator light: red light when charging, automatically turns off when fully charged Size:18.3*2.5cm Color: as shown Features: This reading lights give off a gentle, calming light that's ideal for night reading and falling asleep quicker. It has 3 brightness modes, making it the perfect reading mate before going to bed. Turning on the light brightness defaults to the last used brightness. Long press the power switch for 3 seconds to turn on the light, the default 3000K warm yellow light color, and then short press the power switch to cycle the light color. 5500K white light---4500K warm white---turn off the light. Users can adjust the brightness according to their needs. When any light is on, long press the power switch to adjust the brightness, from the current brightness to full brightness, release the power switch and then long press the power switch, the brightness of the light changes from full to 15%. It can be used as a nightlight to help you walk safely when you get up during the night, as a flashlight when you drop something in the dark! The clip can open wide enough to clamp to a headboard, yet it also clips well to books or the edge of a pillow. It is small and lightweight, ideal for travel. Packing list: 1* Reading Light with Clip