Alert yourself to movement in a doorway or when someone gets out of bed. Place the pressure-activated Signature Series TransMATTer Transmitter under a doormat. The mat connects to the transmitter with a 10-foot cord. Signature Series Receivers are signaled if someone enters or exits a room, or when a child, elderly individual or patient gets out of bed. As a result, it is ideal for use not only in the home but also in hospitals, nursing facilities and even in noisy business settings.