"This Limited Edition medical tricorder is perfect for Dr. McCoy and his staff. It features the distinctive health monitors that were seen over the biobeds in sickbay, comes with a special medical scanner, and has authentic lights and sound. The tricorder is based on detailed study of the original prop. It is full size and measures 7.25” (19 cm) tall by 4.75” (12 cm) across. The head flips up to reveal an illuminated display and three buttons each of which activates a light and different sound effects, including the medical scan and different pieces of dialogue taken directly from the original episodes. Below this the first flap can be opened to reveal the recording discs and the moire pattern, which moves when you press the center button. The lower compartment contains the handheld medical scanner. The standard science tricorder is also available. The tricorder takes three AAA batteries; the hand-held scanner takes two LR44 batteries, which are not included."