The DT660STC motion sensor combines the reliability of microwave/PIR technology with an innovative form of signal processing: Microcontroller Advanced Processing (MAP). Functioning as the onboard computer, the microcontroller analyzes signals and distinguishes between false alarms and actual intruders. This processing provides the ultimate in catch performance and protection against false alarms. 60 ft. x 60 ft. coverage Microcontrolled Advanced Processing (MAP) Microwave/PIR technology Built-in diagnostics and supervision True automatic temperature compensation Patented look-down zones MAP signal processing Full supervisions of microwave and PIR Additional microwave supervision Microcontroller initiated self-tests Installer initiated self-tests Diagnostic LEDs Trouble memory output Fields-of-view: 44 long range (2 overlapping tiers of 22); 12 intermediate; 6 lower and 6 look-down 2 - 4 steps within field-of-view sensitivity Wall or corner mounting flexibility Form A alarm relay Tamper Switch RFI immunity White light immunity