CC2001 is a digital clock. CC2000 series provide an economical solution for any size clock system. They are easily corrected by master clock systems with 59th minute and midnight correction. In addition, all CC2000 series system clocks can receive serial data input from computers or other controllers, for setting time and/or displaying short messages such as "FirE" and "bELL". Up to 50 clocks can be connected to a standard RS232 Port at distances of up to 2000 feet away. Signal drivers are available for adding additional clocks and greater distances.