A4 Ultra-Thin Portable LED Tracing Light Box Dimmable - BlackThis ultra-thin LED tracing light box measures 14.1 by 9.4 inches and is designed for artists and crafters. The 5mm slim profile makes it highly portable, while the USB-powered operation requires a DC 5V power source such as a computer, power bank, or USB wall adapter. Stepless brightness adjustment is controlled via a touch sensor switch, providing flicker-free illumination for tracing, sketching, stenciling, animation, quilting, and diamond painting. A protective film must be removed from the screen before first poundsProductdimensions