Retevis RT28 Two-Way Radio Instruction Manual

1. Overview

The Retevis RT28 is a durable and compact two-way radio designed for reliable communication. It features a robust shell, integrated antenna, and user-friendly controls. This manual provides essential information for setting up, operating, and maintaining your RT28 radios.

Figure 1: Retevis RT28 two-way radios charging in the multi-gang charger.

2. Safety Information

Please read and understand all safety information before using the Retevis RT28 two-way radio.

• FCC Compliance: The FCC ID for our walkie-talkies is 2ASNSRT28. These walkie-talkies meet FCC Part 95 rules.
• Battery Safety: Use only approved Lithium-Ion batteries. Do not expose batteries to fire or extreme temperatures.
• Charging: Use only the provided multi-gang charger or compatible USB charging cables.
• Water Resistance: This product is Not Water Resistant. Avoid exposure to water or moisture.
• Antenna: Do not touch the antenna during transmission.

3. Package Contents

Verify that all items are present in your package:

• 6 x Retevis RT28 Two-Way Radios
• 6 x Batteries
• 6 x Belt Clips & Straps
• 1 x Six-Way Multi-Gang Charger

Figure 2: Detailed view of the Retevis RT28 package contents.

4. Product Features and Components

The Retevis RT28 is designed for durability and ease of use. Key features include:

• Integrated Antenna: The antenna is securely mounted directly onto the radio, preventing detachment and improving durability.
• Robust Knobs: The channel selection and power/volume knobs are integrated for enhanced durability and reliable operation.
• Snap-on Belt Clip: The belt clip is designed for easy attachment and removal without screws, reducing wear and tear.
• USB Charging Port: Allows for separate charging using a compatible USB cable.
• VOX Function: Voice-activated transmission for hands-free operation.
• Local Alarm: An emergency alarm function for critical situations.

Figure 3: Labeled components and dimensions of the Retevis RT28 two-way radio.

5. Setup

5.1 Battery Installation

1. Align the battery pack with the back of the radio.
2. Slide the battery pack into place until it clicks securely.

5.2 Charging

The RT28 radios can be charged using the included multi-gang charger or individually via the USB charging port.

• Multi-Gang Charger: Place the radios or individual batteries into the designated slots on the 6-way multi-gang charger. Ensure the indicator light illuminates, signifying active charging.
• USB Charging: Connect a compatible USB cable to the USB port on the side of the radio. The radio can be charged separately using this method.

Figure 4: The multi-gang charging base, compatible with Retevis RT21, H-777S, and RT28 walkie-talkies.

6. Operating Instructions

6.1 Power On/Off and Volume Control

Rotate the top-most knob clockwise to power on the radio. Continue rotating to increase the volume. Rotate counter-clockwise to decrease volume and power off.

6.2 Channel Selection

Rotate the second knob (channel selection knob) to choose one of the 16 available channels. Ensure all radios intended for communication are set to the same channel.

6.3 Push-to-Talk (PTT) Button

Press and hold the large PTT button on the side of the radio to transmit your voice. Release the button to listen.

6.4 VOX Function (Voice Operated Exchange)

The VOX function allows for hands-free transmission. When activated, the radio will transmit automatically when it detects your voice.

1. To activate/deactivate VOX: From channel 1 to channel 5, press and hold the PTT and side button at the same time to turn on the walkie-talkie. The VOX function will be activated or deactivated.

6.5 Local Alarm

The local alarm function can be activated in emergencies. Refer to the full user manual for specific activation steps.

Figure 5: Visual representation of VOX hands-free and Local alarm features.

7. Maintenance

• Cleaning: Use a soft, damp cloth to clean the radio's exterior. Do not use harsh chemicals or solvents.
• Battery Care: Store batteries in a cool, dry place when not in use. Avoid overcharging or fully discharging batteries regularly to prolong their lifespan.
• Storage: When storing the radio for extended periods, remove the battery and store it separately.

Figure 6: The durable design of the Retevis RT28 ensures longevity.

8. Troubleshooting

If you encounter issues with your Retevis RT28 radio, try the following common troubleshooting steps:

• No Power: Ensure the battery is correctly installed and fully charged. Check the power/volume knob is turned on.
• No Reception/Transmission: Verify that all radios are on the same channel. Check for obstructions or excessive distance between radios.
• Charging Issues: Ensure the charger is properly connected to a power source and the radio/battery is correctly seated in the charging slot. Check the USB cable for damage if using individual charging.
• Poor Audio Quality: Adjust the volume. Ensure the microphone and speaker are not obstructed.

For more detailed troubleshooting, please refer to the comprehensive user manual included with your product or visit the Retevis Store.

9. Specifications

10. Warranty and Support

Retevis provides the following warranty for the RT28 two-way radios:

• Radio Body: 2-year warranty.
• Accessories: 2-month warranty.
• Returns: 30-day no-reason return policy.

Beyond the warranty period, maintenance services are still offered, with buyers responsible for associated costs.

For further assistance or to explore other Retevis products, please visit the official Retevis Store.