Uniden R4 vs. R4w - What's the Difference? - OneSDR

The Uniden R4 and R4w are two high-performance radar detectors that cater to drivers seeking top-tier protection from speed enforcement technologies.

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While both models offer exceptional range, advanced filtering, and GPS-enabled features, the R4w stands out with built-in Wi-Fi and Bluetooth, enabling seamless over-the-air updates and app integration.

In this article, we’ll compare the Uniden R4 and R4w to help you decide which detector best fits your driving style and tech preferences.

Table of Contents

📊 Feature Comparison

Feature	Uniden R4	Uniden R4w
Radar Bands Detected	X, K, Ka, Laser, MRCD/T, Gatso	X, K, Ka, Laser, MRCD/T, Gatso
GPS Integration	✅ Built-in GPS	✅ Built-in GPS
Wi-Fi Connectivity	❌ Not supported	✅ Built-in Wi-Fi
Bluetooth Connectivity	❌ Not supported	✅ Built-in Bluetooth
Auto Mute Memory	✅ Yes	✅ Yes
Display	Multi-color OLED	Multi-color OLED
Voice Alerts	✅ Yes	✅ Yes
R/TACH App Support	❌ Not supported	✅ Supported
Firmware Updates	Via USB	Over-the-air via Wi-Fi
Mounting System	Suction cup	Suction cup
Price	Check Price	Check Price

Pros and Cons

Uniden R4

Pros:

Affordable Price Point: Offers high-end features at a more accessible price.
Advanced False Alert Filtering: Auto Mute Memory reduces false alerts over time.
High Sensitivity: Dual Low Noise Amplifiers (LNAs) enhance detection range.
User-Friendly Interface: Easy-to-read OLED display with intuitive controls.

Cons:

Lacks Wireless Connectivity: No Wi-Fi or Bluetooth support limits remote updates and app integration.
Manual Firmware Updates: Requires connection to a computer for updates.

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Uniden R4w

Pros:

Wireless Connectivity: Built-in Wi-Fi and Bluetooth allow for over-the-air updates and app integration.
R/TACH App Support: Provides real-time alerts and customizable settings via the app.
Enhanced Convenience: Wireless features reduce the need for manual updates and offer more flexibility.

Cons:

Higher Price Point: Additional features come at an increased cost.
Potential Learning Curve: New users may need time to familiarize themselves with app integration and wireless features.

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Background

The Uniden R4 radar detector was officially introduced on October 4, 2021, marking a major leap forward from its predecessor, the R3. Designed with dual Low Noise Amplifiers (LNAs), improved K/Ka band filtering, and Auto Mute Memory, the R4 delivered unmatched detection range and advanced false alert reduction, making it a top choice among enthusiasts.

Building on this success, Uniden launched the R4w in November 2024 at the SEMA Show. The R4w retained the powerful detection capabilities of the R4 while introducing built-in Wi-Fi and Bluetooth, enabling over-the-air firmware updates and real-time app integration via the R/TACH app. Initially released through Uniden’s website, the R4w expanded the R4 platform into the connected device era, catering to users who value convenience and wireless functionality.

🏁 Final Verdict

The Uniden R4 is a solid choice for drivers seeking a high-performance radar detector without the need for wireless connectivity. Its advanced false alert filtering and high sensitivity make it suitable for various driving environments.

The Uniden R4w, while more expensive, offers enhanced features such as built-in Wi-Fi and Bluetooth, allowing for over-the-air updates and app integration. These features provide added convenience and real-time customization, making it ideal for tech-savvy users who value seamless connectivity.

If you prioritize wireless features and app integration, the R4w is the better investment. For those who prefer a straightforward, high-performing detector without the need for additional connectivity, the R4 remains an excellent option.

Uniden R4 vs. R4w – What’s the Difference?