Yale DDV 500 electronic door viewer

Easy to install: Yes Product colour: Black Control type: Button Battery type: 2 x AAA Bore diameter: 1.4 cm Height: 68 mm Width: 128 mm Depth: 15 mm Display diagonal: 8.13 cm (3.2") Display type: LCD Warnings: Only suitable for use in dry and clean areas. Viewing angle: 105° Viewfinder screen size: 3.2" Electrical viewfinder: Yes Compatibility: Doors 38 - 110 mm thick