The NV35MR provides a superior wireless outdoor and indoor solution for windows and sliding doors . The detector is optimised to discriminate false alarms triggered by small birds , cats and dogs . The detector has two operation modes : Pet Immunity Mode protection is provided for outdoor windows and sliding doors measuring up to 7.5 x 2m . For indoor applications , pet immunity can be optionally switched off to provide Sharp Mode protection with enhanced detection for indoor windows and sliding doors up to 10 x 2m . The NV35MR uses an extremely narrow beam optic pattern of 0.5m at 5m , enabling movement in close proximity to the protected door or window without false alarms . It also features integrated creep zone detection . The NV35MR's robust detection capabilities , outstanding stability and high false alarm rejection rate are a result of the systems dual optic beam pattern , Paradox Super Pet Immunity and our field-proven Active IR Anti-Mask detection .