Digital Door Viewer "Snap", ø14 -26mm, White LCD Screen 40-70mm Door Thickness, 3,5 FTF LCD Screen, 0,3" Mega Pixel CMOS Senstor, Viewe Angle 110DG, W/Video & Picture Recorder On 2G FTF Card, Door Beel & Infared Camera, No Batteries, 4xAA Bateries to be used