Huion A4 LED Light Pad Tracing Light Box Adjustable Brightness AC Powered - 12.2x8.3 Inch Eyesight-protected Technology - Brightness 4480 Lux; Illuminate Uniformity 1360 cd/ m2. The BRIGHTEST light table Huion offers; Super bright led lamps provides a perfectly even illuminated surface, gives you a brighter clearer visual experience for tracing. AC Powered - Connects with a 6.56 feet power plug directly from the wall outlet, ensures you have a brighter, more stable work surface. Stepless Adjustable Brightness - Smart brightness memorization allows you to control the LED light freely and effectively; Gradual light changing, NOT in steps like low, medium, and high, simply a better way to find your ideal lighting Scale Design - With sleek lines and a thin profile at 8mm, the Huion A4 tracing light pad adds style to your workspace. Wide Usage - Can be used for Negative Film Viewing, Artwork Tracing, Calligraphy, Scrapbooking, Tattoo Transferring, Sewing Projects, X-ray Film Viewing and more; One year warranty.