Yale 45-4500-1440-00-6011 digital door viewer

Battery type: AAA | Warnings: Keep away from sources of heat and open flame. | Warnings: Avoid contact with liquids, may cause a short circuit or damage to the unit. | Warnings: Only suitable for use in dry and clean areas. | Mounting hole diameter: 1.4 cm | Height: 177 mm | Product colour: Silver | Depth: 16 mm | Minimum door thickness: 3.8 cm | Number of batteries supported: 4 | Display diagonal: 10.2 cm (4") | Width: 140 mm | Viewing angle: 105° | Card reader integrated: Yes | Megapixel (approx.): 0.3 MP | Power source type: Battery | Night vision: Yes | Maximum door thickness: 11 cm