DG85 is a PIR motion sensor for hardwired security alarm system and other security equipment. The product adopts reliable passive infra-red motion detection technology to offer high accurate motion detection. The detector is equipped with two separate PIR motion sensors, allows user to adjust position for getting optimum performance in different installation environment. DG85 utilizes advanced true motion recognition and anti-pests of tware technology, which can help it to make an accurate judgment of true intruder or other interference that can cause wrong alarm. DG85 has two different working modes; bus mode and relay mode, can be used for all kinds of control panels in the market.