A replica of the door switches seen inside Hadley's Hope in the 1986 film Aliens. It is an intruder alarm (which I won't name because now everyone selling an alarm knows it's an Aliens prop), which is better known for being used as the body of the TNR lamp props worn on the Colonial Marines' shoulders. Although left relatively unchanged, the alarms used in the film have had some numbers and letters added and their green buttons painted over, though mine has yet to be modified.
Fun fact: the Aliens screenshots from this page have been used in the 2 most recent eBay listings for Superswitch Intruder Alarms! In the first auction, the yourprops.com watermark was left untouched, but it was cropped out in the second one.
