Videx ESVKX-2S/6286 4000 Series, 2-Way Surface 2-Wire Video Kit with Proximity and 6286 Monitors The 4000 series range of True 2 wire colour 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 not 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