Bello series surface-mounted external unit for video entry systems. Wide-angle high-resolution color video camera (108°) with white LEDs for night-time lighting. Water-resistant front panel (certified protection rating IP54). Tested for corrosion in saline mist and in extreme sunlight with UV rays. The durability of the call button has been tested with over 120k  activations. Operating temperature -13°F to 131°F. Power supply from bus line. Dimensions: 5.8x3.1x inches.