3 COLOR TEMPERATURES AND 5 BRIGHTNESS: 3 kinds of color temperature, warm light (3000 K), warm white light (4500 K) and white light (6500 K). Each CT has 5 brightness levels, so 15 lighting modes are generated. meet all your requirements. Clip on the bed or headboard and read in the bed, comfortable light brings you comfortable life! ANTI-FLICKER LIGHT AND EYE PROTECTION: The Semlos reading light with high quality 5W LED, which saves up to 80% of the energy used by conventional lamps, gives you the same brightness. No flicker, no dark area, no ghosting and a low HEV value eliminates eye strain caused by the strobe effect of traditional light sources. Protect your eyes when reading, drawing, working and studying. TARGETED LIGHTING AND 360 FLEXIBLE COLLAR: The concentrated illumination of the clamp light emits enough light for you to read books without affecting others with dazzling lights. With the flexible 360 gooseneck, you can optimize your light source and easily adjust the lighting position and angle. AUTO-OFF (1 MINUTES) AND MEMORY FUNCTION: If you press the on / off button for 2 seconds, the blue light will flash and the clamp lamp will automatically turn off after 1 minute. The clip-on desk lamp can automatically remember the brightness setting of your last use. When switching on again, the last brightness set and the last set mode are retained. LONG LIFETIME AND STRONG DESIGN: 30,000 hours of life saves you years of maintenance and replacement. The width of the solid clip is 2.75 inches. Attach it to your desk, headboard, or wherever you want. Product description 3 COLOR MODES: White / Warm / Warm White, always make sure to get the most suitable light color according to your purpose. 5 BRIGHTNESS LEVELS: 20% brightness, 40% brightness, 60% brightness, 80% brightness, 100% brightness. Eye-friendly, glare-free and flicker-free lighting, the best companion for nighttime reading. The gooseneck reading light can be adjusted to any angle you want and gives you full 360 degree illumination. The LED clip lamp can be charged directly into the USB port of the mobile device, such as power bank, power supply, PC, computer, etc. MEMORY FUNCTION: It remembers the light setting of your last use, provided that you do not interrupt the power to this lamp. Flexible 360 gooseneck The 360 degree adjustable arm is made of high quality materials. It stays where it was placed without moving or slipping. Its 360 foldable handle can be pointed away from your sleeping roommate! Strong metal pliers The sturdy metal clamp opens up to 2.3 inches and is perfect for use with music stands, pianos, tables, headboards, etc. Protective pads in the clip prevent possible scratches on your furniture. Please note: the clamp is very sturdy and therefore not suitable for attaching to soft furniture such as sofa and headboard in upholstered bed USB power supply (NO adapter) USB POWERED: Comes with a 1.5m long USB cable with which you can easily connect a computer, power supply or power bank (adapter not included).