The 4000 series range of "True" 2-wire color videokits with proximity (ESVKX series), are available as flush or surface kits with a choice of 4 different videophone options from the 6200, 6300, 6400 and 6700 series range. Installations couldn't be easier thanks to the common 2-wire BUS system (VX2300) using two non-polarity twisted pair wires (the system does not require coaxial cable). The videokits are ideal for small-scale "1-to-1" installations or low-rise apartment blocks (up to a total of 12 apartments max. with the inclusion of additional 4000 series button expansion modules), but can also be expanded up to a maximum of 8 entrances where additional 2301N multiple entrance switchers are required. The ESVKX series videokits are available as 1 or 2-button 4000 series color videokits where the flexible design allows for up to a total of 4 videophones per call button with the facility for intercommunication between the videophones in the same apartment or intercommunication between videophones in different apartments. Other key features of the videokit include; adjustable call tone, conversation time and microphone and speaker volume adjustments, selectable camera recall including external camera input. The combined speaker and camera module (4384X-1 or 4384X-2) entry panel has a built-in color camera with white illumination LEDs that provides the best quality picture in any lighting condition. It also includes a built-in proximity reader (located behind the panels nameplate window) which is capable of storing up to 50 user keyfobs. It also has a lock release relay (C, NO and NC) with selectable capacitor-discharge, push-to-exit input, call progress reassurance tones and DDA compliant call progress LED's; BUSY, CALL, SPEAK and DOOR OPEN.note; 1 way videokits supplied with 1x 955/C prox. card and 2x 955/T prox. keyfobs; 2 way videokits supplied with 1x 955/C prox. card and 4x 955/T prox.