Handset video intercom, 3.5" black and white LCD display, 2 programmable AUX keys - white.Wall monitor with 3.5˝ black and white LCD display. The ringtone adjust/exclude keys, contrast and brightness keys and 2 auxiliary keys are on the left. The main keys are clearly visible and backlit, for door opening and self-insertion of entry panel videos. It features a Master/Slave function and a video relaying between extensions function for simultaneous calls. It includes brace for wall-mounting on horizontal or vertical 503 box, 506E box and Ø 60 mm round box. Compatible with the X1 and XIP systems.