Utilizes sub-miniature tubes + 2 transistors in the output stage. Overall appearance is very good to excellent. No cracks or chips on the burnt orange plastic case. It may need buffing for some minor light scratches & other marks. Handle is excellent. Grille cloth is excellent. Dial and brass dial screw are excellent. Dial markings are excellent except for very minor wear on "55". Both battery doors are excellent. Chassis excellent, very clean & complete. No rust. Not tested. Requires one 45 Volt "B" battery & one 4 Volt "A" battery. Approximate size in inches 6.125W, 1.5D, 3.75H. Item #2568