AeonLabs Multisensor This motion detector (PIR = passive infrared receiver) detects the presence of a person in a room. In addition to motion sensing this device can measure temperature, humidity and light intensity. The sensor is a battery-powered device, which is in sleeping state unless an action is detected. After a programmable sleeping time the device wakes up and sends a status information or it can be asked for status at any time. After this the unit goes back to sleeping modus. Batteries can be changed without unscrewing the device from the wall. The unit will give a visual warning on the device and sends a warning to the Zipato, when batteries need to be replaced. The unit offers a tampering control and sends an alarm message when tampered.