Master Clock System is control outputs for secondary clocks and independent peripheral devices. The SEIKO programmable Master Clocks not only control secondary clock precisely for synchronized time keeping, but they can also be programmed to sound a chime. Furthermore the SEIKO Master Clock can automatically turn on and off air conditioning equipment, illuminations, etc. for energy savings, and can also control crime prevention equipment for manpower savings. Use these master clocks in offices, schools, factories, stores, banks, etc.