This is a hero deployable machined aluminum hand scanner replica for a TR-580 Mark VII Medical Tricorder. It features green sequentially flashing LEDs around the perimeter and a single red blinking LED on the top. Built by Gary Tierce (Nicksdad). Added to my collection in August, 2013.Description from Memory Alpha: “The major difference [between medical and standard TR-580s] was the addition of a deployable hand scanner. While some standard TR-580s also had removable scanners, the medical TR-580s were much more advanced and could provide detailed scans of an entire individual, or give focus to a single area. It was not necessary to use the scanner for the TR-580 to function. The scanner could be separated from the tricorder, either to feed data to another source or not be attached to the tricorder at all.”