The GT-DM is an all-in-one stainless steel entrance panel with audio, video, name scroll, and keypad. The camera in the GT-DM has a 170° veiwing angle with PanTilt & Zoom. Voice annunciation when the visitor calls in. The LCD can be set to Energy Saver mode and the built in motion sensor will activate the LCD when a visitor approaches. The keypad will support up to 500 access codes for keyless entry.