Viking CL-D4 Digital Clock with 4" Tall Numbers

Keep operations, security staff and monitoring systems synchronized with the Viking CL-D4 Digital Clock from Viking Electronics. Designed for Pro Mass Notification and security environments, this 4" digit digital clock delivers minute-accurate time across campuses, control rooms, and surveillance hubs so logs, alerts and automated systems stay aligned. The CL-D4 receives and retransmits RF clock sync every minute using 915–928 MHz frequency-hopping technology and an internal antenna, extending coverage with a built-in repeater and minimizing sync gaps. Bright 4" red numbers and two adjustable brightness levels ensure readability in day or night conditions, while AC/DC power and loss-of-communication alerts reduce service interruptions. Integrated diagnostics let technicians quickly view signal strength and sync history for faster troubleshooting. FCC Part 15 compliant and purpose-built for monitoring, security and mass-notification applications, the Viking CL-D4 is an easy-to-install solution to standardize time across devices and teams. Ideal for security control rooms, surveillance centers, schools and healthcare campuses—contact sales or add to cart to integrate synchronized time into your notification and monitoring systems.

• Ensures facility-wide, minute-accurate time sync for coordinated operations and reliable event logging
• Built-in RF repeater and 915–928 MHz frequency-hopping link extend signal range and simplify deployment
• 4" high red digits provide clear, visible time across control rooms, lobbies, and security hubs
• AC/DC power with two brightness levels plus loss-of-communication alert reduces maintenance and avoids downtime
• Built-in diagnostics show signal strength and battery/display status for fast preventive maintenance