... , perimeter, etc Hot!! wired active infrared detector (used for window, perimeter, etc)Hot!! wired ... active infrared detector (used for window, perimeter, etc)Features: ... exceed 40ms,it can overcome traditional alarm detector's drawback of false alarm and failure ... Finites infinity compatibility7.Touch off time:40ms8.Alarm speed:alarm time≥1.5sec9.Light axis fix:Level ...