Motorola RDU4100 Radio


Item # PR-RDU4100
MSRP: $359.00
Sale Price: $309.00
(You save $50.00 )

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Information - Motorola RDU4100 Radio

The Motorola RDU4100 radio has been replaced with the Motorola CP100d-UA radio.

  • CP100d radios are not programmed to work out of the box on default RDX frequencies.
  • The CP100d can be programmed to match RDX frequencies, or any custom frequencies, by using CPS2.0 Lite, which is free Motorola programming software designed to work with all CP100d analog only radios.
  • CPS2.0 Lite can be downloaded along with default RDX frequency programming templates.
  • We can program CP100d radios to RDX default frequencies. A $10 tech fee will be charged for each programmed radio.
  • CP100d analog only models can be upgraded to analog/digital operation for a fee.


If you're looking for a tough two-way UHF radio at the lowest price, you need the Motorola RDU4100 from Tech Wholesale.

These RDX series 10-channel radios have everything you love about Motorola business radios inside a military-grade case. The metal die-cast chassis is covered in polycarbonate to meet MIL-STD 810 C-F standards. Drop it from construction site scaffolding, leave it in the mud or hit it with a blast from a fire hose, your RDU4100 will shake it off like it's nothing.

Of course, good communication is still the most important thing, and the RDU4100 business radio delivers crystal-clear real-time talk. It uses high-powered UHF radio frequencies that penetrate physical obstacles such as walls, vehicles and trees while also reducing interference from other radios.

With 10 channels to choose from, you'll have plenty of options so everyone can stay in touch. Motorola's noise-reduction technology reduces ambient sound for better clarity, and the radio itself is 30% louder than previous models.

Enjoy voice coverage for up to 350,000 square feet or 30 floors with this powerful UHF radio that's ideal for military, hospital, police and university first responder use. It covers 89 business radio frequencies and comes with privacy codes to eliminate eavesdropping.

Our Motorola RDU4100 accessories help you get even more out of each radio. Add a Ritron UHF Jobcom Base Station to increase the range even further, invest in an extra RLN6308 ultra-high capacity battery for extra job life or attach a Motorola RAN4033 Stubby Antenna for easier carrying.

Tech Wholesale has the lowest prices in the industry on Motorola radios and provides lifetime technical support from our experts. Learn about more of the advanced features below or use our live chat feature to ask any radio question on your mind.

The high-powered UHF waves make the Motorola RDU4100 two-way walkie-talkie an excellent choice for both indoor and outdoor communication.

You can increase its range with the Ritron Jobcom UHF Base station, and a high-capacity RLN6308 battery will also help you get hours more use out of your RDU4100 every time. Be prepared for every eventuality when you use a 6-radio multi-charger to power up all your radios for all your employees at the same time.

Power-level note: The RDU4100 radios are both a 2 and 4 watt radio. They are defaulted with both high power and low power frequencies. Channel 3-8 are default-set to 2 watts. If you are needing more power, try channels 9-16, as those are set to the 4-watt power level.

Other excellent accessories for this durable radio that is used in hospitals, construction, the military, and other demanding industries, include the 2-hour rapid charger kit that fully recharges your radio in two hours. For a radio that's easier to carry around, we recommend the "stubby antenna" that can easily be switched out with the standard-length antenna.

We are a Motorola Authorized Two-Way Radio Dealer with years of experience selling the RDU4100 radio and other quality Motorola radio products. Because of that, we have worked with a large number of clients in almost every industry imaginable. That means we know how to work with you specifically and provide you with more than just a walkie-talkie online shop. We want you to get only the product that is right for your needs, and we know that not all businesses have the same needs.

Key Features

  • 3 call alert tones.
  • Battery save conserves your battery's power for multi-shift coverage.
  • 3 voice inversion scramble settings increase signal privacy.
  • Removable antenna. A "stubby antenna" is available for all 4-Watt RDX series radios.
  • Radio mic gain.
  • Accessory mic gain.
  • 2-pin captive cover accessory connector.
  • Compatible with XTN accessories
  • Requires an FCC Business License.
  • Compatible with XTN two-way radio frequencies and privacy codes.

Who should use the RDU4100 2-way radio? Heavy hitter businesses who are serious about productivity, security and staying on schedule!

Multiple Buildings: Two-way radio range depends on signal strength, weather conditions and elements native to the terrain over which you're broadcasting. Packing a 4-Watt punch, the RDU4100 is able to penetrate through walls of multiple buildings in a 350,000 sq. ft radius and cut upwards to 30 floors*. Also a repeater capable radio, the RDU4100 lets you work around what you can't push through providing site-wide, two-way radio coverage.

Warehouses: Communication via walkie-talkie is essential in a workplace where goods flow in and out constantly. Coordinate loading, unloading and shipping, stocking and shelf space management in a jiff. Dispatch teams to take care of temperature controlled stock before things heat up.

Large Hospitals: Coordinating support teams for patient care and community safety is a huge responsibility. Doctors, nurses, supplies, administrative services, security all need to run like clockwork when lives are at stake. Housekeeping rises to a whole new level when you're looking at containing biohazards. A high-powered, multi-channel 2-way radio like the RDU4100 is an absolute must.

Military: Crucial to moving troops and supplies, the two-way radio has served honorably in military operations since the technology was first developed. The RDU4100 with its 4-Watt reach, extensive feature set, long battery life and repeater capability ranks high in any deployment situation, be it logistics or special forces.

University Campuses: Keeping college campuses secure is critical to student safety and a reputation that enjoys continuing increased enrollment. Two-way radios enable security to react to emergencies quickly. Walkie-talkies also offer the perfect solution for landscape and building maintenance crews to coordinate tasks and equipment. At 18.5 hours on a single charge, the RDU4100 covers multiple shifts.

Large Hotels: From parking to the penthouse, large hotel properties rely on two-way radio communications to coordinate the workings of what should feel like a home away from home. The RDU4100 lets you talk to housekeeping up to 30 floors up and dispatch maintenance to handle technical issues across 350,000 square feet*. Meet the needs of your guests and convention attendees in record time, so all your reviews on Trip Advisor shine with 4 stars. *Coverage will vary based on terrain, conditions and the radio model used. ** CPS is available as free download. Windows¨ XP, Windows 2000 compatible, separate USB cable required.

Which industries benefit most from the Motorola RDU4100 Two Way UHF Radio?

This radio is great for businesses that operate across multiple buildings, in warehouses or in massive spaces such as hospitals. It's also great for the military and law enforcement professionals because it's so tough, and it's popular in large hotels and among security professionals on college campuses and beyond.

How do I get to the radio's advanced features?

When you order the Motorola RDU4100 Two-Way UHF Radio from, you get a free download of the software that allows you to control advanced aspects of the radio.

What is the range or coverage area of the Motorola RDU4100?

With the Motorola RDU4100 you can expect coverage ranging from 3-4 miles or 35 floors.

How many channels does the Motorola RDU4100 offer?

The Motorola RDU4100 has 10 channels. How many channels do you need?

**If the radios you are ordering need to communicate with existing radios - please request ‘programming required’ and add the required programming information OR call our support hotline at 800.215.5160 for a walkthrough on how to gather programming information.

Is the RDU4100 compatible with other Motorola radios I may already have?

That entirely depends on the frequencies your current two way radios are operating on. This model of walkie talkie runs on UHF frequencies and is communication compatible with other UHF walkie talkies - like the Motorola CP100d-U, CP200d-U or CLS1410

To confirm if your radios are compatible, email us or send us a chat in the bottom right corner of your screen.

Does it come with a warranty, and what does the warranty cover?

These two way radios come with a 2 year replacement warranty. This warranty will cover any defective or malfunctioning walkie talkie. Contact us with any warranty questions!

Where can I request a quote for Motorola RDU4100?

If you are purchasing radios in bulk - definitely contact us for a quote for special bulk pricing!

What is the battery life of the Motorola RDU4100, and are there options for extended battery life?

The battery life for the Motorola RDU4100 is 18.5 hours.

For extended battery life, check out the following accessories:

If you have multiple walkie talkies, we highly recommend a 'base station' for your walkie talkies like a multi-unit charger.

Is the Motorola RDU4100 suitable for indoor and outdoor use?

The Motorola RDU4100 operates on UHF frequencies - meaning it would be ideal for indoor and or outdoor use. 

Is the Motorola RDU4100 waterproof or water resistant?

The Motorola RDU4100 is water resistant. If there is moisture in the air, it is no issue. If the walkie talkie is submerged then turn it off and let it dry.

How durable is the Motorola RDU4100? Is it built to withstand tough environments or weather conditions?

The Motorola RDU4100 meets MIL-SPEC 810 & IP55 Specifications. Simply meaning these are durable and would be recommended for medium to heavy duty use. Walkie talkie recommendations for specific industries

Please view the question above for water resistance levels.

Are there any additional accessories available for this RDU4100, such as headsets or carrying cases?

There are many accessories for the RDU4100 walkie talkie. View all RDU4100 accessories.

Does the Motorola RDU4100 require an FCC license for use?

The RDU4100 does require an FCC license.

Find more information from the official FCC website.

Can I use the Motorola RDU4100 in my specific industry? 

You can shop walkies talkies for your industry here. Or take our questionnaire to find the perfect two way radio based on your requirements.

The Motorola RDU4100 is recommended for industries like or similar to: hotels, manufacturing plants, nursing homes.

What is the size of the Motorola RDU4100?

This walkie talkie is generally medium/large sized. The dimensions for the Motorola RDU4100 are 4.5 x 2.2 x 1.8 inches.

What is the difference between analog and digital walkie talkies?

Learn the difference between digital and analog radios.

Is there customer support available if I encounter any issues with the product?

Here at Tech Wholesale, we pride ourselves on providing the best service and support for our customers. Email us at or call….

To place an order or request a quote, call us at: 888.925.5982

For product technical information and support, please call: 800.215.5160

Manufacturer Help Desks: 

  • Motorola Business Radios - 800-448-6686
  • Motorola Hotline - 1-800-215-5160

Are there any discounts or promotions currently available for the Motorola RDU4100?

We always have a discount program available! Please contact us at for current discounts and promotions.

Where can I find official Motorola product information about this model?

View information about the Motorola RDU4100 from the official Motorola website.

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View Motorola Walkie Talkie Frequencies.

    Product Specifications

  • Band: UHF
  • Channels: 10 channels
  • Power: 4 watts
  • Weight: 10.3 ounces
  • Dimensions: 4.5 x 2.2 x 1.8 inches
  • Outdoor range*: Reliable communications for 1-3 miles
  • Indoor range*: Up to 350,000 square feet and 30 floors
  • 89 business-exclusive radio frequencies
  • 213 privacy codes that give you a clear and private signal


  • One Motorola RDX Series RDU4100 2-way Radio
  • Lithium-ion battery
  • Stand-up charging tray
  • Wall charger
  • Belt clip
  • Removable antenna
  • User guide
  • Safety sheet
  • Two year warranty

    Additional Specifications

  • VOX-equipped
  • 3 call alert tones
  • Battery-saving mode
  • 3 voice-inversion scramble settings
  • Removable antenna
  • Radio mic gain and accessory mic gain
  • 2-pin captive cover accessory connector
  • Compatible with XTN accessories
  • Compatible with XTN two-way radio frequencies and privacy codes
  • Requires an FCC Business License
  • 1-year Motorola warranty included
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