ACE Instruments manufactures a variety of GPS/Ethernet based Synchronized clocks in order to help maintain uniform time across the plant using master slave synchronisation of clocks over Wireless RF/ Wired RS 485 communication. The Master GPS Clock is customized to accept the Global Positioning Satellite Time of the country of use . It is accurate to 500 millisecs & transmits the GPS Time to Slave Clocks over a Wireless RF Mesh Network / RS 485 wired communication. The Master Clocks can either be GPS Synchronized or Ethernet Based wherein the Master Clock synchronizes with the Server to display server time all across the network of clocks.