OPTEX infrared passive detector with long range spherical lens. 21x 21m (2.4 x 45m long range), opening 85 degrees and 68 zones. 9.5 - 16VDC 11mA max consumption and RFI protection 30V/m excellent performance at high temperatures. It also includes special lens protection to limit false alarms from light source reflection. 2/4 pulse setting and HI / MED / LOW sensitivity selection. (Grade 2)