Fully functional, complete. Ancestor of the TENS unit. Has all its wires, electrodes and rubber pads. Signed "United Diathermy Inc., Deluxe Model Serial 7778". Has a timer, heat control knob,two electrode inputs and a milliamperes gauge signed Marion instruments. Wires are in great shape. Wood box is sturdy and has a drawer for accessories. Measures 15 x 16 x 11 inches and weighs 31 pounds.