This is a USB-powered (A to C) monitor light. It offers three color temperatures: 3000K, 4000K, and 5700K, and the brightness can be adjusted steplessly. It's 460mm long, 105mm deep, and can clamp onto monitors up to 66mm thick. I purchased it two years ago and used it for about a year. There are no noticeable scratches, and it's in relatively good condition. A USB cable (A to C) is included.