1. Display color is red, customizable according to client requirements; 2. Communication method: WIFI module, TTL serial port, baud rate 115200bps; 3. Print "No Smoking" and "Keep Quiet" on the display panel; 4. The display screen is double-sided; 5. The display is suspended, with wiring running inside the suspension rod; 6. Equipped with a WIFI communication interface cable, the WIFI module is external to the screen, and the communication interface cable can provide 3.3V power to the WIFI module; 7. The display is powered by AC220V, with the input power cable running inside the installation suspension tube; 8. 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, ensuring no reflection under fluorescent lights. All components use high-reliability, long-life parts, designed and manufactured for maintenance-free operation; 9. Clock specifications: 630 (width) * 190 (height) * 44 (thickness) mm; 10. Environmental requirements: Operating temperature: -35 to +70°C; 11. Clock display content: Hours and minutes, character height 4 inches, specially designed wide red 8-shaped digit tubes; 12. Power supply method: AC220V.