The ES-160F/NTP6 is a crystal-based Master Clock / Time Code Generator / NTP Time Server. The unit employs a temperature compensated crystal oscillator (TCXO) which provides the ES-160F/NTP6 with an accuracy of one second per month. Six .56" yellow LED's display the real time or date while the unit simultaneously generates several types of time code. The unit provides a Coin Cell for time backup.