Hi. This is old/new stock. It is a BedPro Alarm Monitor that basically goes off when you get off a bed. I believe is it just a pressure sensitive monitor. It is made for adults, not infants. I tested it and this thing would be great for someone who sleepwalks. As son as I got off the bed the alarm went off and it is pretty loud. It goes under a mattress so you don't even know it is there. I placed it between my memory foam mattress and the box spring and it worked fine. I just set it on the high sensitivity setting. Comes with the power adapter, Nursing station cord and splitter, mattress pad, main unit and instruction papers. These can still be purchased new for around $250. Please see pictures for details. Thanks for looking.

Here is a YouTube video showing how it works: https://www.youtube.com/watch?v=Em6Q0KMbg-E&t=131s