Smanos Multi-Beam IR Sensors 13 reviews 63 orders 138.60 inc GST Detects for intruders walking through the invisible infrared beams between the two sensors (T for transmitter, R for receiver); can be up to 6m / 20 ft apart Works with the K1/K2 Completely wireless and battery-powered Weatherproof design for outdoor use Battery life up to 3 years Ideal for placements on fences, balconies, patios, backyard or pool entries, private entry ways or corridors SPECIFICATIONS: Model BM-20 Trigger mechanism 4 infrared beams Detection range 6m or 20 ft between 2 sensors Batteries in transmitter 3V CR123A Lithium battery x 2 pcs Batteries in transmitter 3V CR123A Lithium battery x 3 pcs Frequency 868MHz or 915MHz (N. Manufacturer Smanos Article number BM-20 Shipping Free Shipping Delivery time 3-4 days Availability In stock − + Add Save Description Detects for intruders walking through the invisible infrared beams between the two sensors (T for transmitter, R for receiver); can be up to 6m / 20 ft apart Works with the K1/K2 Completely wireless and battery-powered Weatherproof design for outdoor use Battery life up to 3 years Ideal for placements on fences, balconies, patios, backyard or pool entries, private entry ways or corridors SPECIFICATIONS: Model BM-20 Trigger mechanism 4 infrared beams Detection range 6m or 20 ft between 2 sensors Batteries in transmitter 3V CR123A Lithium battery x 2 pcs Batteries in transmitter 3V CR123A Lithium battery x 3 pcs Frequency 868MHz or 915MHz (N. America) Wireless range 80 m / 262.5 ft (in open area) Waterproof rating IP66 Operating conditions temperature -20°C ~+50°C (-4°F ~+122°F), humidity < 95% RH (non-condensing) Dimensions (L x W x H) 42 x 47 x 612mm More information × Please double check all specifications with the manufacturer. Below is a guide only