1. Introduction
The Retevis RB48 Pro is a high-power, heavy-duty two-way radio designed for reliable communication in demanding environments. Featuring IP67 waterproofing, advanced AI noise reduction, and an extended battery life, it is suitable for construction sites, outdoor activities, and other professional uses.
Image: Retevis RB48 Pro Two-Way Radio, front view.
2. Package Contents
Ensure all items are present in your package:
- RB48 Pro walkie talkie (x4)
- EEM003 earpiece (x4)
- User manual (x4)
- Adapter (x4)
- Base charger (x4)
- Anti-loss lanyard (x4)
- Data cable (x1)
Image: All components included in the Retevis RB48 Pro 4-pack.
3. Key Features
3.1. Long Range Coverage
The RB48 Pro extends communication up to 700,000 sq ft and 50 floors, making it reliable for large construction sites and multi-story buildings.
Image: Visual representation of the RB48 Pro's enhanced communication range.
3.2. All-Day Battery Life
Equipped with a 2800mAh high-capacity battery, the radio delivers up to 18 hours of continuous use and 5 days of standby time, ensuring connectivity through long shifts.
Image: The RB48 Pro highlighting its 2800mAh battery and extended usage times.
3.3. AI Noise Reduction
Advanced 3-layer AI technology cancels out machinery, wind, and background noise, ensuring clear communication in noisy job sites.
Image: Diagram illustrating how noise reduction provides clear communication in noisy environments.
Video: Demonstration of the RB48 Pro's noise reduction capabilities in a noisy environment.
Video: Noise cancellation test of the RB48 Pro, showing its effectiveness in windy conditions.
3.4. IP67 Waterproof and Dustproof
The RB48 Pro features an IP67 3-proof design, built to withstand tough conditions including submersion in water up to 1 meter deep for 30 minutes, and resistance to 0.1µm dust particles. It is also drop-resistant up to 2 meters.
Image: The RB48 Pro highlighting its IP67 3-proof design for water, dust, and drop resistance.
Video: Waterproof test of the RB48 Pro, demonstrating its ability to function after exposure to water.
3.5. One-Touch Group Call
Simple push-to-talk (PTT) function allows crews to connect instantly, improving team efficiency.
3.6. Anti-Loss Lanyard
Includes an anti-loss lanyard to keep the radio securely by your side, preventing drops and loss.
Image: The RB48 Pro shown with a concealed air acoustic earphone and anti-loss lanyard.
3.7. Emergency Alarm
Features a 1-second alarm activation for rapid emergency response on job sites.
Image: The RB48 Pro displaying its emergency alarm function.
4. Product Overview (Components)
The RB48 Pro features a T-shape design for an ergonomic and firm hold. Key components include:
- Antenna: For transmitting and receiving signals.
- Power/Volume Knob: To turn the radio on/off and adjust volume.
- Display: Shows channel, battery status, and other indicators.
- PTT (Push-to-Talk) Button: Press to transmit, release to receive.
- Call Button: Initiates a call.
- Menu Button: Accesses radio settings.
- Monitor/Scan Button: Activates monitor or scan functions.
- Side Keys: Programmable for various functions like alarm or NOAA.
- USB-C Port: For charging.
- 2.5mm Headset Jack: For connecting earpieces.
- 360° Rotating Clip: For secure attachment.
Image: Diagram detailing the shape, accessories, buttons, channels, rated voltage, dimension, and weight of the RB48 Pro.
5. Setup
5.1. Charging the Radio
The RB48 Pro supports dual charging modes: directly via the USB-C port or using the included base charger. Ensure the radio is fully charged before first use.
Image: The RB48 Pro placed in its charging base.
5.2. Attaching Accessories
Attach the anti-loss lanyard to the designated loop on the radio. The 360° rotating clip can be used to secure the radio to clothing or a belt.
5.3. Initial Frequency Sync
Wireless frequency sync can be achieved in 15 seconds for fast multi-radio setup.
6. Operating Instructions
6.1. Power On/Off and Volume Adjustment
Rotate the power/volume knob clockwise to turn the radio on and increase volume. Rotate counter-clockwise to decrease volume and turn off.
6.2. Channel Selection
The RB48 Pro has 16 pre-set channels. Use the channel selector knob to choose your desired channel.
6.3. Push-to-Talk (PTT)
Press and hold the PTT button to transmit your voice. Release the PTT button to listen for incoming transmissions.
6.4. Group Call
Utilize the one-touch group call function for instant communication with your team on a designated group channel.
Video: A guide on how to use the RB48 Pro walkie-talkie, covering basic operations and features.
6.5. NOAA Weather Channels
Stay informed and safe with 11 NOAA channels providing real-time weather alerts and emergency information.
Image: The RB48 Pro display showing NOAA weather channel information.
7. Maintenance
7.1. Cleaning
Wipe the radio with a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners. Ensure all port covers are securely closed before cleaning with water.
7.2. Battery Care
To prolong battery life, avoid fully discharging the battery frequently. Charge the radio regularly, especially if it will be stored for an extended period.
8. Troubleshooting
8.1. No Power
- Check if the battery is charged.
- Ensure the power/volume knob is turned on.
8.2. Cannot Transmit or Receive
- Verify that the radio is on the correct channel.
- Ensure the PTT button is fully pressed when transmitting.
- Check for obstacles that might be blocking the signal.
- Confirm that the radio is within range of other units.
8.3. Poor Audio Quality
- Adjust the volume.
- Ensure the microphone and speaker are not obstructed.
- Check if AI noise reduction is enabled in very noisy environments.
9. Specifications
| Feature | Detail |
|---|---|
| Model Number | RB48 Pro |
| Item Weight | 6.64 pounds (total for 4-pack) / 3010 Grams |
| Product Dimensions | 1.5"D x 2.28"W x 5.9"H (per radio) |
| Batteries | 4 Nonstandard Battery batteries required (included) |
| Color | Yellow |
| Number of Channels | 16 |
| Special Features | 2800mAh Battery, AI noise reduction, Group Call, Longer Range, Anti-loss lanyard, Triple protection-IP67 |
| Voltage | 7.4 Volts |
| Water Resistance Level | Waterproof (IP67) |
10. Warranty and Support
10.1. Warranty Information
We provide a 5-year warranty for the radio body and a 1-year warranty for accessories. We also offer a 30-day no-reason return policy.
10.2. Post-Warranty Service
Beyond the warranty period, we continue to offer maintenance services. Buyers are responsible for corresponding costs. For service, please contact us on Amazon; we will reply within 12 hours.
