Wireless Adaptive™ Dual Sensor: GEM-DT   • Broad 40' x 40' coverage   • Exclusive Adaptive dual technology for superior false alarm resilience even from animal/pet activity and optimized catch.   • Active self-test of microwave & PIR   • 5 Interchangeable lens patterns   • One button walk-test w/ auto shut-off   • 3 distinct transmissions for "tamper", "alarm" and "self-test failure"   • EMI/RFI Protected with Fully-shielded SMD circuitry   • Includes batteries, tamper and mounting screws