The Protech by Hirsch SDI-77XL2-ABC PIRAMID XL2 is the ultimate multi-lens outdoor dual technology sensor, shipping with Lens A pre-installed and Lens B and Lens C included in the box — giving you three field-selectable coverage patterns from a single SKU. Choose the wide-angle 90 ft. x 50 ft. Lens A for broad area protection, the medium-angle 100 ft. x 35 ft. Lens B for balanced coverage, or the narrow-angle 125 ft. x 20 ft. Lens C for corridor-style detection — and swap lenses in the field without replacing the sensor. Powered by Protech's proprietary Stereo Doppler X-Band microwave (10.525 GHz) combined with passive infrared in a mandatory AND-gate configuration, the XL2-ABC delivers false-alarm-free detection while filtering out birds, small animals, swinging signs, and vegetation. Operating from 10–28 VDC with a wide temperature range of -40°F to +158°F (-40°C to +70°C), this versatile sensor includes the outdoor housing with shroud, swivel mount, PH-6L bracket, 10-position range and sensitivity control, LED on/off switch, and bird/animal immunity switch. The SDI-77XL2-ABC is ideal for integrators who need maximum deployment flexibility across diverse perimeter security applications.