HUION 23.5 Inch LED Light Box Tracer Photography ArtCraft Light Table for Drawing - A3 w/Pucks and Tracing Paper EYESIGHT PROTECTED LED - Allows you to see through very thick paper, provides better visual experience when tracing out portraits and correcting line work with blurry photograph; Illuminate Uniformity 85% (730 cd/ m2 ). ADJUSTABLE BRIGHTNESS - Smart brightness memorization allows you to control the light freely and effectively; It will automatically memorize the brightness setting of you last selection. ULTRA THIN & PORTABLE - 8mm of thickness and 5lbs of weight, easy to travel; Diagonally Length: 23.5 Inches; Work Surface: 16 by 12 Inches. The Led Tracing Light Pad's has the standard A3 size, which is compatible with lots of usages. WIDE USAGE - Huion A3 tracing light box can be used for lots of different tasks including Negative Film Viewing, Artwork Tracing, Calligraphy, Scrapbooking, Tattoo Transferring, Sewing Projects, X-ray Film Viewing and more. Comes with a paper clip, five pieces of tracing paper,a puck (It can be separated into two hemispheres, which can be placed under the light box to help you adjust the comfortable angel to suit your perference) ; One year warranty.