Meet the Dakota Alert Wireless Floor Mat: a cool product that lets you know when you have new visitors. Just put it on your welcome mat, and the receiver will let you know when you have a new visitors by sounding a chime or flashing a light. The system offers a wireless range of up to 1000 feet. How can you use such a system? To get an alert when someone is visiting you or find out when people who should not be moving are moving in your home (e.g. patients). The mat operates on 2 CR2032 batteries.