MODEL: JB-H878 MAIN FEATURES2 or 4 wire modelsDual LEDs for 360° visibilityAdvanced detection and discrimination algorithmsEasy installation and maintenanceSleek low-profile housing designDurable sensor head. No need for replacementSMD circuit board designSatisfactory quality and reliability guaranteedNormally-closed (N/C) -Normally-open(N/O) selectable relay outputFive-year limited warrantyDimensions:  Ø100 X 48 mm