The Wafer 1 is only 0.3" thick. The tracing area measures 12.5" x 9" - easily fits A4. The Wafer has dim-able LED'S and provides an even spread of light from edge to edge. It is powered by Mains/AC Adapter and is very low heat. Wafer is ideal for calligraphy, stenciling, scrap-booking, embossing, quilting, embroidery, sewing, and much more.