The Motorola RDU4100 has been discontinued.
Motorola has retired the RDX series. The recommended replacement is the Motorola CP100d, a current digital/analog UHF business radio. For help migrating an existing RDU4100 fleet or for pricing, call 1-800-681-8023 or request a quote.
Motorola RDU4100 UHF Business Two-Way Radio
The Motorola RDU4100, part of the RDX Series, was engineered for reliable, high-performance on-site communication. This 4-watt UHF radio operated on 89 business-exclusive frequencies with FCC Narrowband compliance, pairing rugged construction with advanced audio to keep teams connected in demanding work environments.
Key Features
- 4-Watt UHF Power: Strong, clear coverage across 89 business-exclusive channels.
- Advanced VOX Capability: Hands-free operation with compatible accessories.
- Enhanced Audio: Magnetic speaker field reduction for clearer sound in noisy spaces.
- Military-Grade Durability: Meets MIL-SPEC standards for dust, wind, shock, and vibration.
- Tricolor LED Interface: Shows radio status at a glance.
- Custom Programming & Cloning: User-specific setup with easy radio-to-radio cloning via an optional cable.
Technical Specifications
| Feature | Specification |
|---|---|
| Series | Motorola RDX Series |
| Frequency Band | UHF |
| Power Output | 4 Watts |
| Channels | Up to 10 (89 business-exclusive frequencies) |
| Audio | Magnetic Speaker Field Reduction |
| Durability | MIL-SPEC (Dust / Wind / Shock / Vibration) |
| Programmable Buttons | 2 |
What Replaces the Motorola RDU4100?
Now that the RDX series is retired, here is what we recommend in its place. Need help matching channels or migrating a fleet? Contact our radio experts, or browse the CP100d resource center.
- Motorola CP100d Non-Display — the direct replacement. A current digital/analog UHF business radio with clearer audio and a longer service life.
- Motorola CP200d — step up to a display model with more channels and full MOTOTRBO digital features.
- RDX accessories — batteries, chargers, and antennas to keep an existing RDU4100 fleet running.
See the Recommended Replacement →
Frequently Asked Questions About the Motorola RDU4100
Is the Motorola RDU4100 discontinued?
Yes. Motorola has discontinued the RDU4100 and the RDX series. The recommended current replacement is the Motorola CP100d. For remaining stock or fleet pricing, call 1-800-681-8023 or request a quote.
What is the best replacement for the Motorola RDU4100?
The Motorola CP100d is the closest match—a current UHF business radio with both digital and analog operation. For more channels and a display, step up to the Motorola CP200d. Learn more in our guide: Can the Motorola CP100d be used in different industries?
Can I still get accessories for the Motorola RDU4100?
Yes. Batteries, chargers, antennas, and audio accessories for the RDU4100 remain available in our RDX accessories collection.
What were the range and power of the Motorola RDU4100?
The Motorola RDU4100 was a 4-watt UHF radio operating on 89 business-exclusive frequencies with up to 10 channels—delivering strong on-site coverage for warehouses, retail floors, and job sites.
Was the Motorola RDU4100 durable enough for tough jobsites?
Yes. The Motorola RDU4100 met MIL-SPEC standards for dust, wind, shock, and vibration, and used magnetic speaker field reduction to keep audio clear in loud environments.