World Time Clocks incorporate one Master Clock showing IST (Indian Standard Time) in six digits HH:MM:SS format and upto 8 Slave Clocks to display zonal time in 4 digit format HH:MM or six digit format HH:MM:SS. The users programmable, World Time Clocks have bright RED, GREEN, BLUE or AMBER LED’s in 7-segment display mode. The World Time Clocks are supplied pre-configured for easy installation and require only mechanical fixing and connection with 230V-50Hz mains supply using cable provided. Battery back up with auto charging and changeover provided for smooth functioning for years without any interruption.