Outdoor WIRELESS infrared passive curtain detector by OPTEX with antimasking technology, upper and lower beam with a maximum range of 5m. Ideal for doors, balcony doors and generally for areas where we want beam coverage. Possibility to adjust the range to 2 or 5 meters. (at a mounting height of 1.2m) and 190° rotation. Sensitivity 2°C at 0.6m/s. Operating voltage: 2.5~10VDC / 17mA (max) Accepts 3-9VDC lithium battery, NO/NC Alarm output (optional). Operating temperature: -20°C, +60°C, IP55, Installation height 0.8~1.2m Consumption: 9mA in Stand by, 3mA in Alarm Dimensions: 3.5cm (W) x 15.5cm (H) x 4.2cm (D). Optionally a tamper switch for the wall is provided. The package includes the mounting box for the wireless transmitter. No battery is required to power the FTN-R as it uses the transmitter battery for power, but halving its life. In this way we save extra battery costs, limit the volume and get a general low bat from the whole device. The package does not include the transmitter.