The Aiphone AX-8MV Audio Video Master is an audio video master station for the AX series. The unit is CAT-5e homerun wired to its CEU (Central Exchange Unit) and features an oversized TALK button to activate the VOX or PTT style communication, door call-in indicator, call button for other master stations in the system, a call tone volume control and a button for door release. The AX-8MV can communicate with 7 other master stations and up to 8 sub or door stations. The color of this item is black. Features: Components connected using CAT-5e wiring 8 masters, 120 remotes stations Distances of up to 980 feet per run! Video Door stations with HID embedded prox card readers Two talk channels PTT or VOX operation at master, hands-free at doors Master-to-master calling Masters available with 3-1/2” color TFT LCD Composite video output from CEU and Master Station Priority call-in Communication privacy Electronic access control integration via RS-232 CCTV system integration via RS-232 CO Line Interface using Viking K-1900-5 Selective door release Access Control System Interface PC based programming and event logging Rack mount (19″, 2U) or wall mount CEU Selective Call priority feature Compatible with IE Series door stations Scan Monitoring of door stations with programmed time Footswitch operation of TALK switch Computer style headset can be connected to master for communication Requires 2 Aiphone PS-2420UL to Power System (not included)