Description
Tired of clocks that drift out of sync or cost a fortune to wire? The Viking CL-D4 delivers big, bright 4-inch red digits that stay perfectly on time—without running wires everywhere.
This wireless digital clock is part of Viking’s proven CL Series system. It acts as its own repeater, so the signal reaches farther and stays strong even in large buildings. Just plug it in (or use the included adapter), hang it up, and you’re done. Schools, factories, offices, churches, and restaurants love how easy and reliable it is.
Expert Take: For medium-to-large facilities that need clear, reliable time display without hassle, the CL-D4 is a smart choice. Pair it with the CTG-2A master clock and CL-RFT transmitter for a complete system.
Key Features
- Built-in repeater – Receives and re-transmits the sync signal every minute to extend coverage
- Bright 4-inch tall red digits visible up to 100 feet
- 915–928 MHz frequency hopping technology – resists interference and needs no FCC license
- Adjustable brightness (two levels) with anti-glare bezel
- 12 or 24-hour format with automatic time correction
- Loss-of-communication alert for easy monitoring
- Built-in diagnostic mode – view signal strength, last sync time, and more
- Simple installation – just power and hang (surface or double mount options available)
- Includes UL-listed 120VAC power adapter
- Works with Viking’s full wireless clock system for facility-wide synchronization
Technical Specifications
- Display: 4.0" (102 mm) tall red digits, 4-digit format
- Visibility: Up to 100 ft (30.48 m)
- Power: 120VAC / 13.8VAC 1.25A UL-listed adapter (included) or 16–28VDC / 14–28VAC
- Current Consumption: 190 mA @ 24VAC (max brightness)
- Dimensions: 6.75" H x 13.31" W (172 mm x 338 mm)
- Shipping Weight: 3.5 lbs (1.59 kg)
- Operating Temperature: 32°F to 90°F (0°C to 32°C)
- Humidity: 5% to 95% non-condensing
- Frequency: 915–928 MHz frequency hopping
- Transmitter Output: 0.25 Watt (8 dBm), up to 500 ft in open space
- Input Sensitivity: -103 dBm
- Mounting: Surface (CL-SMD4) or double (CL-DMD4) – sold separately
- Housing: Durable ABS plastic with anti-glare red bezel
- Compliance: FCC Part 15 (no license required)