36 LEDs with 25 light modes The book reading light offers 5 kinds of color temperature: white, warm white, warm white, warm white, warm white, amber. Each color temperature has 5 brightness levels: 20%, 40%, 60%, 80%, 100%. A total of 25 light modes to meet all your needs.Energy saving and eye protection: With USB, LED light consumes around 75% less energy than standard bulbs. traditional incandescent, saves money and is more environmentally friendly. No flicker, no glare, no UV radiation. So it can protect your eyesTouch sensor and memory function: The reading light uses humanized design which is touch control. With just a simple touch, you can turn the clip light on / off and change color temperature modes. Memory function automatically remembers the brightness of the last use, smart and convenient.Sturdy clip and flexible neck: LED reading light with upholstery can be attached to any edge of furniture without scratching them . Suitable for lectern, table, computer table, headboard, drawing board, etc. With the flexible 360 gooseneck, you can adapt it to any angleHigh capacity battery and USB socket With the built-in high capacity 1800mAh lithium battery, the Hours of operation from lightest to darkest are 3 hours, 7 hours, 9 hours, 16 hours and 30 hours. The USB interface is compatible with all devices with a USB port, eg laptops, USB chargers and external batteries.