The Alpha Communications® WMD515 Wireless Passive Infra-Red Detector is for use with the AlphaEcall™ 200 series (AEC200) Wireless Emergency Call System. The detector features advanced digital signal processing to recognize "human signature" size and movement, reducing false alarms. The WMD515 has a tamper protected case and the 3V lithium battery is included.

The WMD515 Wireless Passive Infra-Red motion detector with pet immunity is designed for residential and low-traffic commercial applications, with less than 100 activations a day. This PIR uses advanced signal processing to provide outstanding catch performance with unsurpassed false alarm immunity. With Pet Friendly pet immunity, alarms triggered by animals are greatly reduced.