Huion A2 26.77 Inches Large Thin Light Box Drawing Light Board Tracing light pad with Adjustable Brightness for Artcraft, Animation, Sketching, Tattoo Transferring Large but Thin and Portal: It is a large light box with illuminated surface 20.8"x13". The thickness is 0.31" and it weights 1990g. Diversed Usage: Ideal For Art, Craft, Design, Drawing, Animation, Cartoon, Stencilling, Tattoo, and Photo Work and More Adjustable Brightness: Comes with a touch switch designed to control the light intensity from dim to bright. The maximum brightness reaches to 548CD/ Eyesight Protected Design: The flick free led lamps provide even illuminated working surface which won't cause strain eyes. Long Life Span and 1 Year Warranty: can be continuous used for 50000 hours and it won't generate too much heat after long hours working.