Yale Digital Door Viewer 1 - DDV1 1 Year Local Warranty By Yale Singapore Features: Automatic saving of image into internal memory Image with time and date stamp Door bell integrated on the outside Very clear image on screen Easy operation - just press the button Can replace mechanical door viewer without additional work Infrared camera with night mode function Specifications: Fits standard 14mm hole from mechanical door viewer Door thickness 38-110mm 3.2" LCD screen 4 pcs. AAA batteries Viewing angle 105 degree Built in internal memory stores up to 50 images Allows for a micro SD card to be inserted to enhance memory