TimeTrax Sync LED Red Digital Clock . Requires Timetrax transmitter and software (9T1Wi) . Features 2.5" 6 digits (HH:MM:SS) & up to 100 feet viewing distance . Receives reliable time update every 20 seconds from TimeTrax Wireless RF Transmitter . Military Time capable . Clock face is tinted to reduce glare . Bright red LED (2.5 inch, 6 digit) . Modern styling gives your facility a high-tech look . Durable ABS frame and shatterproof polycarbonate lens . Extremely rigid body construction designed for durability and long life . Dual-sided clock mount available with wall or ceiling brackets (bracket not included) . Automatically adjusts for Daylight Saving Time and resets if power failure occurs . Made in USA