Motorola RDU4100 Two-Way Radio for Business 10-Channel UHF
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Motorola RDU4100 Two-Way Radio for Business 10-Channel UHF

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$359.00 $309.00
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RDX SeriesTM
Easy to use, rugged and affordable.
In the competitive construction fi eld, improving productivity and controlling costs has never been more
important. Motorola two-way walkie talkie radios provide clear communication – often in noisy environments - and that’s essential to avoiding downtime, accelerating job progress and enabling faster response.

Instant communication in Construction means:
Improved jobsite coordination
Reduced operational costs
Faster delivery and material coordination
Smoother work crew scheduling
Quick coordination and response to emergencies
Enhanced safety and security
Immediate production updates
Increased customer service and satisfaction
Reduced monthly operating costs


Performance you can count on!

The Motorola RDX RDU4100 UHF 2-way radio performs well in harsh and noisy environments, generating 30% louder audio than the XTN and AX Series. It also works effectively up to 350,000 square feet (30 floors indoors). UHF radios perform best inside steel and concrete structures.

  • Up to 4W Power (2W low power setting)
  • 10 channels
  • Pre-programmed to 10 channel/code combinations
  • 2 programmable buttons
  • Repeater capable
  • 39 analog and 83 digital interference eliminator codes
  • 22 hrs battery life (4W, 5/5/90, Battery Save enabled)
  • Designed to IP-55 and MIL-SPEC specifications
  • 3 voice-inversion scramble settings to minimize eavesdropping
  • Channel scan with selectable scan list
  • 3 audible call tones
  • 2 pin accessory plug (compatible with XTN/CLS/DTR/AX Series)
  • VOX (hands-free use with accessories) with 3 sensitivity levels
  • Tri-color LED with transmit, receive, and low battery indication
  • 4.5” x 2.1” x 1.5”
  • 9.9 oz
  • Steel/Concrete Buildings: Up to 350,000 sq ft
  • Multi-Level Buildings: Up to 30 floors
Accessories Included:
  • 2400 mAh Li Ion rechargeable battery (Up to 22 hrs average daily use)
  • 12 hr drop-in charging tray with wall adaptor
  • 3" spring belt clip
  • User's guide
  • Warranty card


Exceptional Audio Quality

The RDX Series™ audio is 30% louder than previous Motorola XTN and AX models. 2000 mW audio output, speaker magnetic field reduction, wind-noise reduction and improved RF specifications all help deliver this superior audio quality.

Rugged and Durable

Durable metal diecast chassis helps radios hold up under demanding conditions. The RDX Series meets Military 810 C, D, E, F and IP54/55 specifications for shock, rain, humidity, salt fog, vibration, sand, dust, temperature shock, and high and low temperatures.

Customer Programming Software (CPS)*

Allows users to perform various programming functions. Plus, the CPS software provides access to new features such as Reverse Burst to eliminate unwanted noise, Radio Reporting to manage cloning and radio profiles, Manager Lock, Power Select, PL/DPL Defeat and two additional Time-Out Timers.

Power and Coverage**

2 Watt RDX Series radios provide coverage of up to 250,000 sq. ft., 20 floors—4/5 Watt models cover up to 350,000 sq. ft., 30 floors.

Exceptional Industrial Design

Weighing just 8.6 ounces, the RDX Series is comfortable to wear all day. Plus, the user interface makes the radio simple and easy to use with little or no training.

Flexible and Durable Battery Life Solutions

The custom RDX Series Li-Ion battery packs are designed and manufactured to ensure durability of the radio. Motorola business radios come with the standard Li-Ion battery (up to 12 hrs of life per charge). Options include a high capacity Li-Ion battery (up to 24 hrs) and an alkaline battery kit (up to 26 hrs).

Business Exclusive Frequencies

Operates on 89 UHF (expanded vs XTN and AX models) or 27 VHF business-exclusive frequencies (varies by model); features 122 codes to help ensure a clear signal.

Tri-Color LED Interface

The convenient tri-color LED interface identifies different radio features and radio status.

Easy Cloning

Quickly copy settings from radio to radio with either the Radio-to-Radio Cloning Cable or the Multi-Unit Charger accessories. (Both sold separately.)

Convenient Charging

An easy-to-use drop-in charger keeps radios charged, ready—and centrally located.

Advanced Voice Activation (VOX)

Convenient hands-free operation when used with optional accessories.

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Shipping & Returns

Returns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.