Product parameters: ColorWhite Light source typeLED Power supply and plug typeWired battery capacity: 1800mA Light source power: 3W Switch: touch switch Working voltage: 5V Color temperature: 4000K~6500K/m Light color: warm white light/white light Brightness adjustment: three-level dimming Package includes: reading lamp * 1 Charging cable*1 P Eye-care reading lightLED clip light provides comfortable light, no ghosting and no flickering light to protect your eyes from bright injury and radiation. Ideal for learning, handicrafts, reading or painting. 3 light colors and 3 brightness levelsThe clamp desk lamp each has 3 adjustable brightness levels to meet our different needs. For example, a low setting is ideal as a night light without disturbing your bedfellow. while high attitude is suitable for reading or studying. High Capacity & USB Rechargeable --- Built-in 1800mah lithium battery, longer battery life, no delay for work and study. Clip-on light can work 3-5 hours at 100% brightness. 10-12 hours 60% brightness; 25-28 hours 30% brightness. USB rechargeable reading lamp, plug and play, more convenient. Sturdy Clamp & Flexible Neck --- The sturdy clamp perfectly attaches to bedside, music stands, office desks, computer desks, shelves, headboards, drawing boards, etc. 360 flexible gooseneck allows you to adjust them to any angle. Ideal for kids, crafts, lighting up the keyboard, reading at night. Memory function: Press the power button about 3 seconds to turn off the book light. It saves the last brightness and lighting color of the lamp. Note: 1.Due to the difference between different monitors, the picture may not reflect the actual color of the item. 2.Due to manual measurement, there may be an error of 1-2mm.