The LACOKI 9 Settings (3 Color * 3 Brightness) 1800mAh USB Rechargeable Battery Eye Protect LED Reading Light with Flexible Gooseneck and Heavy-Duty Clip is Your Best Choice for Reading Working and Studying FEATURE: The circular lamp head simulates the natural light, soft and not glare, the light is repeatedly refracted, enter the eye is more uniform, called the principle of diffuse reflection. The hospital operating table lamp also simulates this principle, reduce multiple shadows and clearer vision. Long time use will not cause eye fatigue Built-in 1800mAh rechargeable battery reading lamp, longer battery life. The 3-hour fast charging technology makes your clip light fulled. The book light can be use up to 28 hours(low brightness mode), allows you to read anytime, anywhere, eliminating the trouble of connecting wire Electricity protections: Include Abnormal Voltage Protection, Short-Circuit Protection, Charging Overload Protection etc. Those protections keep the clip lamp in normal work condition and avoid the risk of fire SPECIFICATION: 9 Settings (3 Color * 3 Brightness) Colour: Warm light, White light, Warm & White light Brightness Level: High(100% Brightness), Mid(60% Brightness), Low(30% Brightness) Battery Capacity: 1800mAh Charging Time: 3h Runtime: 3-5h(High), 10-12h(Mid), 25-28h(Low) Material: Aluminum Alloy, ABS Plastic PACKAGE INCLUDE: LED Reading Light USB Cable Instruction Manual