InSync GPS Master Clock. See menu at bottom.

• PC running Windows NT, Windows XP, Windows 2000 or Windows 2003
• At least one spare RS-232 com port
• PS/2 keyboard socket or an adapter to the older (large) keyboard socket
• PC must be located in a position where a 15' (5m) cable will allow the external antenna adequate open access to receive GPS signals from the GPS satellite cluster. If this is not available, an extension cable may be used but this will reduce signal quality.
• If other network clients are to synchronize to the NTP/SNTP Time Server, a network card and network will be needed.
  
  

If you have any questions about any of the above requirements, please contact support before purchasing.