Retevis RB648/RB48 Heavy Duty Walkie Talkie Instruction Manual

1. Introduction

The Retevis RB648/RB48 is a professional heavy-duty walkie talkie designed for reliable communication in demanding environments. Its robust construction, IP67 waterproof and dustproof rating, and user-friendly features make it an ideal communication tool for construction sites, farms, logging camps, and other outdoor or industrial settings. This manual provides essential information for setting up, operating, and maintaining your device.

Figure 1: Retevis RB648/RB48 Walkie Talkies highlighting IP67 waterproof feature.

2. Product Features

• IP67 Waterproof and Dustproof: Designed to withstand harsh environments, protecting against water immersion up to 1 meter for 30 minutes and complete dust ingress.
• High Capacity Battery: Equipped with a 2000mAh Li-ion battery, providing approximately 12 hours of working time and up to 48 hours of standby time.
• Multi-Charging Options: Features a USB Type-C charging port for direct charging and supports desktop dual-charger stations for convenience.
• Dual PTT Design: Includes a large Push-To-Talk (PTT) button on the front for easy operation, even when wearing gloves, enhancing communication efficiency.
• Long Communication Distance: Offers a communication range of up to 2.3km for FRS versions and 2km for PMR versions, ensuring clear communication across work sites.
• Shock Resistant: Built with durable TPE+PC material, capable of withstanding drops from up to 2 meters.
• Crystal Clear Sound: High-quality loudspeaker ensures clear audio even in noisy environments.
• Call Vibration Reminding: Provides vibration and tone alerts for incoming signals, improving awareness.
• NOAA Weather Alert (FRS Version Only): The FRS version includes 11 NOAA channels for weather alerts, crucial for planning and safety in outdoor work.
• License-Free Operation: Ready to use out of the box without complex programming or licensing requirements for basic operation.

Figure 2: Model variations: RB648 (PMR446) and RB48 (FRS).

3. Package Contents

Please check the package carefully to ensure all items are present and in good condition:

• 2 x RB648 PMR446 or RB48 FRS Walkie Talkie
• 1 x Desktop Charger (Dual charging bases)
• 1 x USB Charging Cable (2-in-1)
• 2 x Reinforced Belt Clip
• 2 x Sling
• 1 x User Manual
• 2 x Earpiece (Optional, if purchased)
• 2 x USB Adaptor (Optional, if purchased)

Figure 3: Contents included in the product package.

4. Product Overview

Familiarize yourself with the various parts and controls of your Retevis RB648/RB48 walkie talkie:

Figure 4: Front view of the walkie talkie with labeled components.

1. Antenna
2. Call / Weather key
3. PTT (Push-To-Talk) button
4. Menu / Key lock
5. Up key
6. Down key
7. Earphone jack
8. Power / Volume switch
9. LED display
10. Scan / Squelch key
11. Alarm key
12. Big PTT (Push-To-Talk) button
13. Type-C charging port

5. Setup and Charging

5.1 Initial Battery Charge

Before first use, fully charge the walkie talkie battery. The device comes with a 2000mAh Li-ion battery.

5.2 Charging Methods

• Desktop Charger:

  Connect the dual-charging base to a power source using the provided USB charging cable and a compatible USB adapter (not included in standard package). Place the walkie talkies into the charging slots. The charging indicator light will show the charging status.

  

  Figure 5: Charging using the desktop dual-charger.

• Direct USB Type-C Charging:

  Open the protective cover of the Type-C charging port on the side of the walkie talkie. Insert the USB Type-C cable into the port and connect the other end to a power source (e.g., power bank, PC, car charger, wall charger). This method allows charging without removing the belt clip.

  

  Figure 6: Direct charging via USB Type-C port.

A full charge typically takes several hours. Avoid overcharging to prolong battery life.

6. Basic Operation

6.1 Power On/Off and Volume Adjustment

Rotate the Power/Volume switch (8) clockwise to power on the device. Continue rotating clockwise to increase the volume. Rotate counter-clockwise to decrease volume and power off.

6.2 Channel Selection

Use the Up key (5) and Down key (6) to select your desired communication channel. Ensure all radios in your group are on the same channel for effective communication.

6.3 Transmitting and Receiving

To transmit, press and hold either the PTT button (3) or the Big PTT button (12). Speak clearly into the microphone. Release the PTT button to receive. The LED display (9) will indicate transmission and reception status.

Figure 7: Utilizing the Dual PTT buttons for communication.

6.4 Call/Weather Key

Press the Call/Weather key (2) to send a call tone to other radios on the same channel. In FRS versions, this key can also activate NOAA weather channels.

7. Advanced Features

7.1 VOX (Voice Operated Exchange)

The RB648/RB48 supports VOX functionality (levels 1-9), allowing hands-free transmission when a certain voice level is detected. Refer to the full user manual for detailed VOX activation and sensitivity adjustment instructions via the Menu/Key lock (4).

7.2 NOAA Weather Alert (FRS Version Only)

For RB48 FRS versions, the device can receive 11 NOAA weather alert channels. This feature is vital for staying informed about severe weather conditions, especially in outdoor work environments. Activate this feature using the Call/Weather key (2) or through the menu settings.

Figure 8: NOAA Weather Alert feature (FRS version).

7.3 Scan and Squelch

The Scan/Squelch key (10) can be used to activate channel scanning to find active conversations or adjust the squelch level to filter out background noise. Consult the full user manual for specific instructions on these functions.

7.4 Alarm Function

Press the Alarm key (11) to activate an emergency alarm, alerting other users in your group to a potential situation.

8. Maintenance

• Cleaning: Wipe the device with a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners.
• Water Exposure: Although IP67 rated, always ensure the Type-C charging port cover is securely closed when exposed to water or dust. After exposure to water, dry the device thoroughly before charging.
• Battery Care: Store the battery in a cool, dry place. Avoid extreme temperatures. If not used for extended periods, charge the battery periodically to maintain its health.
• Storage: Store the walkie talkie in a dry, dust-free environment away from direct sunlight and extreme temperatures.

9. Troubleshooting

10. Specifications

Figure 9: Detailed technical specifications for RB48 and RB648 models.

11. User Tips

• Optimal Range: For best communication range, especially in urban or obstructed areas, try to maintain line-of-sight with other users.
• Battery Life: To maximize battery life, consider using the low power setting when communicating over short distances.
• Earpiece Use: In very noisy environments, using an optional earpiece (not included in standard package) can significantly improve audio clarity and privacy.
• Channel Etiquette: Always check if a channel is clear before transmitting to avoid interrupting ongoing conversations.
• Weather Alerts (FRS): If you have the FRS version, regularly check NOAA weather alerts when working outdoors to prepare for changing conditions.

12. Warranty and Support

For warranty information, technical support, or service inquiries, please refer to the contact details provided with your purchase or visit the official RETEVIS website. Keep your proof of purchase for warranty claims.

13. Product Demonstration Video