The PG9984P is the highest quality PowerG motion sensor, featuring dual-band PIR and microwave motion detection, giving you double the false alarm protection at up to 33ft. It also includes True motion detection as well as an 88lbs pet immunity limit.

DSC PowerSeries PG9984P PowerG 915Mhz Wireless Dual Tech Motion Detector w/ Pet Immunity

The PG9984P is a Dual Band motion detector that will detect movement on the PIR spectrum and includes K-band microwave detection as well as a backup so that you get the best in detection without the normal false alarms that you might experience with a regular PIR motion detector.  

This motion detector also uses temperature compensation technology that will adjust the sensitivity settings automatically so that it can tell the actual human body temperature from the surrounding area where it is located. That means that if the room temperature closely matches that of the human body; the detector will still be able to distinguish. The PG9984P also features a handy LED indicator light that will allow for optimum placement without having to check back at your keypad.

Specifications:

Dimensions 115 x 60 x 48mm (4.5 x 2.3 x 1.1in)
Battery Life for 5 years (typical use)
Battery Type 3V CR123A Lithium Battery
Weight 90g (3oz)
Operating Temperature -10°C to 55°C (14°F to 131°F)

Visible link quality indicator on the device
Vandal-resistant design
Dual Technology PIR and K-Band Microwave frequency to reduce false alarms
Anti-disguise mode to prevent intentional circumvention of the detector