Features: • Moisture proof ultrasonically sealed polycarbonate case and lense • Small and easy to install in any outlet box (K4000) or 3" diameter post and in many other applications • Built-in delay action - eliminates activation caused by lightning • Available with weatherproof outlet box cover plate or with post collar. Cover plate included with K4321 Specifications: Operating Temp. Range: -40°F(-40°C) to 158°F(70°C)