Very thin - only ½" thick (14 mm). Modern technology provides extremely even, bright illumination. 8"x10" viewing surface , with two 5400 K color corrected lamps with 20,000 hour life. The unit can be used flat on a table, standing at an incline, or hung on a wall. The Light Pad is also designed to display photo transparencies held under a clear plastic panel. Fits in a briefcase or stores in a desk drawer. It is powered by a 12V, DC adapter. The overall size is 12 1/4" x 9 1/4" x ½". Weight: 2 lbs.