From Detection Systems, Inc., this is a Request To Exit PIR, DS160. Features wrap-around coverage with complete pattern control, SLI sequential logic input - directional detection, door monitor with relay control and sounder alert, Motion Analyzer II signal processing, and AC/DC operation (all of this info is from the box). Box shows a little wear, but this is new and unused, I only removed it to photograph it (the little plastic package in the photo contains masking wedges, by the way). I don't know anything about this kind of item (it came from my Dad's things, and he used to work for Diebold), but if you have any questions, feel free to ask and I will do my best to find the answer. Asking $10.00 obo. Everything I have listed for sale is "or best offer", so feel free to make an offer. ~~~~~ ALL ITEMS ARE AVAILABLE FOR LOCAL PICKUP. I sell a huge variety of stuff to supplement my income and help me put the last of my kids through college. Some items come from flea markets or estate sales, and some come from around our home, but many items come to me from my extended family of hardcore hoarders. So, the variety really can be vast and unpredictable. Please check back often, because you really never know what I will have from one day to the next! Thanks for visiting and have a great day!