The wireless, sensitive motion sensor reliably detects movements using a built-in passive infra-red detector. The actual range depends on the local conditions, e.g. solar radiation, and is usually five meters.
The infra-red motion sensor is suitable for use at the entrances and exits of homes and interiors. It reliably detects when objects are approaching, even in the dark. In addition, it is an important part of home monitoring and reports possible break-in attempts.