3 color temperatures and 5 brightness levels: 3 color temperatures, warm light (3000K), warm white light (4500K) and white light (6500K). Each CT has 5 brightness levels to create 15 lighting modes. meet all your needs. Clip on the bed or headboard, read on the bed, the comfortable light brings you a comfortable life Flicker-free and eye-care: Semlos reading lights feature 5W premium LEDs which save up to 80% of the energy consumed by traditional lamps, giving you the same brightness. No flicker, no dark spots, no ghosting and low HEVV values, eliminating eye fatigue caused by the stroboscopic effect of traditional light sources. 360 FLEXIBLE TARGET ILLUMINATION: The illumination clip lamp concentrate emits enough light for you to read books without disturbing others by dazzling light. With the 360 flexible gooseneck, you can optimize the light source and easily adjust the lighting position and lighting angle. Auto off (1 minute) and memory function : Long press the on/off button for 2 seconds, the blue light will flash and the clip light will automatically turn off after 1 minute. The clip-on desk lamp automatically remembers your last brightness setting. When you turn it back on, you retain the last brightness and mode settings. LONG LIFE AND ROBUST DESIGN: 30,000 hours of life saves you years of maintenance and replacement. Solid clips are 2.75 inches wide. You can hang it on a table, headboard or anywhere you like. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store