Catalog > Consumer Electronics > Security & Alarms > Access Control > Video Doorphones Management Centre Management Centre VDAS-MNG CENTRE APARTMENT SYSTEM MANAGEMENT CENTRE Discontinued Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Features 4 inch Color LCD Screen Standby Display Time Calling extension Monitoring entrance Quick dialing, rapid call-back according to the incoming call number Automatically discern the calling from outdoor station and user extension, then indicated by different ring tune Automatically display the alarm information: Building/Floor and Room, obvious alarm signals Automatically record 32 groups newest alarm information according to FIFO principle Reserve Guarding Alarm nearby and Electronic Patrol Management Data Port 99 Management Stations are available Temperature: -20~+50degC Humidity: <85% Harmonic distortion: ≤5% Dimension: 260x430x55mm