Brand new, unused. I bought this at a home center some time ago, intending to install it, but I ended up storing it without using it. I think it's very effective for home security. I'm listing it because I hope someone will use it. Although it's brand new and unused, there may be minor scratches on the packaging due to storage. Therefore, please refrain from purchasing if you are sensitive to such details. Revex Wireless Chime X Series Transmitter and Receiver Set Security Human Sensor X850