1. Display Color: Multi-color LED display clock, P2.5, luminous point color: 1R1G1B; 2. Communication interface is RJ45, Ethernet time synchronization; compatible with wireless methods such as WIFI, LTE-4G, and IOT for time synchronization and management as per user requirements; 3. *Equipped with data security authentication, peer time calibration, and management functions; the clock authenticates the time server via Transmission Control Protocol/Internet Protocol. If authentication is successful, the clock can read the time server's time; if authentication fails, the time server is deemed illegal and unsafe, and the clock cannot perform time synchronization; 4. *Supports three different time sources: (1) NTP time server synchronization; (2) Time and Information Management System software synchronization; (3) Both NTP time server and Time and Information Management System software synchronization; 5. *Features power on/off functionality, executing display and communication switch actions based on the configured power on/off time; 6. *Includes countdown functionality, displaying normal time, countdown start time, countdown duration, and exam subject during the countdown period; 7. *Supports time and text information display functionality, allowing configuration of text content, display start and end times, display frequency, etc., via software; 8. Supports different time display modes, configurable or operable via remote control, including: 1) Year, month, day, hour, minute, second, weekday + temperature and humidity; 2) Year, month, day, hour, minute, weekday + temperature and humidity; 3) Year, month, day, hour, minute, second, weekday + temperature and humidity + prompt message; 4) Exam display interface; 5) Recording and broadcasting display interface; 6) Countdown display interface; 9. Capable of normal time synchronization and other functions without relying on the Time and Information Management System software; 10. Features Ethernet configuration functionality, using dedicated software to configure local network parameters, time server IP, size, display mode, product category, etc.; 11. Supports display of exam instruction text information; 12. Allows configuration of displayed images and display areas via backend software; 13. Equipped with power-off memory function; in case of external power failure or network disconnection, the clock automatically switches to internal clock mode; 14. Brightness ≥600 cd/m2, pixel pitch 2.5MM; minimum Chinese character display size ≥16*16 dots; 15. Viewing angle (2θ—) horizontal +140 degrees; vertical 45°/65°; driving method 1/16 (constant current drive); 16. The outer frame is made of black cold-rolled box, one-time molding, acrylic panel, elegant and stylish. The clock face is treated with anti-glare coating, ensuring no reflection under fluorescent lights. All components are high-reliability, long-life parts, designed and manufactured for maintenance-free operation; 17. Independent timing accuracy: ≤±0.05 seconds/day; 18. Power supply: 220VAC±10%, 50Hz; 19. Environmental requirements: -15℃ to +55℃, 10% to 95% RH; 20. Clock dimensions: 670mm*190mm*44mm (length*width*thickness).