OPTEX pir detector, outdoor redwall wireless 40x4 m antimasking. vandal-resistant, coverage 40m x 4m. mounting height: 2.3, 4m., powered by lithium or alkaline battery, antimasking. vandal-resistant. anti-rotation. 2 detection zones, ambient temperature and light detection. coverage adjustment. sensitivity selector, alarm relay and tamper against sabotage. fault output. ip65