SDC-QC6A Mater Clock
* 6 digits 0.5inch 7-segment LED display and 16-key remote control
  equipped for editing time, date, year, week, bell time, etc.
* Equipped RS422 can drive all the digital time clock series.
* Internal back-up battery may be used for 48 hours typically
  after power failure. When AC power comes up the master will 
  correct all dial clocks and digital clocks automatically.
* The accuracy is within 0.1 sec per day.
* Input power: AC 60Hz or 50Hz, 110V or 220V or DC 12V external
                      input equipped.
    * Size: 20 x 6 x 12.6 inch (W x H x D), 19inch rack mountable.
    * Size: 8.7 x 13.8 x 8.7inch (W x H x D), wall mountable.

Slave Clock:
* All slave clocks can be used alone without Master clocks.
* When power failure, the equipped back-up battery can memorize time.
  After power resumes, no adjustment required for correcting time.