2 WIRE TECHNOLOGY. Indoor monitor with 7  » touch screen lcd display. White color. The device is also equipped with soft-touch buttons for managing calls and opening electric locks. » Doctor’s office function for automatic opening of the main electric lock. Capture of the frame when a call arrives and the possibility of recording a video on an SD card (not supplied). Mute button to exclude the ringer. Direct power supply from 2-wire bus or via 30V auxiliary power supply VI2F-ALI600MA. Dimensions (LxHxD): 220x140x28 mm. V44 EASY SYSTEM.