1. Introduction
Thank you for choosing the Retevis RT637 Kids Walkie Talkie. This device is designed for clear and reliable communication, offering a fun and safe way for children to interact. This manual provides essential information for proper setup, operation, and maintenance to ensure optimal performance and longevity of your walkie talkies.
Image 1.1: Retevis RT637 Kids Walkie Talkies
2. Product Features
- 16 Channels & 99 Privacy Codes: Minimizes interference and allows for secure communication.
- Child-Friendly Design: Ergonomically designed for small hands, made from durable, non-toxic PC+ABS plastic with excellent impact and heat resistance.
- Versatile Communication: Supports one-to-one or one-to-many communication.
- VOX Function: Enables hands-free communication without pressing the 'TALK' button.
- LED Flashlight: Provides illumination for nighttime play or emergency situations.
- Long Range: Powerful transmitter and high reception sensitivity ensure stable signal over distance.
- Key Lock Function: Prevents accidental channel changes during play.
- Automatic Squelch: Reduces background noise for clearer sound.
Image 2.1: Key Features Overview (Note: This model features 16 channels, not 22 as depicted in the graphic.)
3. Package Contents
Please check the package for the following items:
- 2 x Retevis RT637 Walkie Talkies
- 2 x Belt Clips
- User Manual (this document)
Note: AAA batteries are not included and must be purchased separately (8 x AAA batteries required for a pair).
Image 3.1: Product Contents and Dimensions
4. Parts of the Device
Image 4.1: Retevis RT637 Parts Diagram
- Antenna: For transmitting and receiving signals.
- Channel Indicator: Displays the current channel.
- PTT (Push-To-Talk) Button: Press and hold to transmit your voice.
- Power/Menu Button: Press and hold to power on/off. Press briefly to access menu settings.
- Call Button: Press to send a call tone.
- Up Button: Navigates up in menus or increases values.
- Lamp Button: Activates the LED flashlight.
- Down Button: Navigates down in menus or decreases values.
- Talk Button: Alternative to PTT for transmitting voice.
- Speaker: Outputs received audio.
5. Setup
5.1 Battery Installation
Each RT637 walkie talkie requires 4 AAA batteries (not included).
- Locate the battery compartment cover on the back of the walkie talkie.
- Push down on the clip and slide the cover off.
- Insert 4 AAA batteries, ensuring correct polarity (+/-).
- Replace the battery compartment cover and slide it until it clicks into place.
Image 5.1: Battery Compartment and Belt Clip
5.2 Powering On/Off
- To Power On: Press and hold the Power/Menu button until the LCD screen illuminates.
- To Power Off: Press and hold the Power/Menu button until the LCD screen turns off.
6. Operating Instructions
6.1 Channel Selection
Your RT637 walkie talkie has 16 available channels.
- With the walkie talkie powered on, press the Power/Menu button once. The channel number will flash on the LCD screen.
- Use the Up or Down buttons to select your desired channel (1-16).
- Press the Power/Menu button again to confirm the channel selection.
6.2 Privacy Codes (CTCSS/DCS)
The RT637 supports 99 privacy codes (CTCSS/DCS) to minimize interference from other users on the same channel.
- After selecting a channel (as described above), press the Power/Menu button twice. The privacy code number will flash.
- Use the Up or Down buttons to select your desired privacy code (01-99). Code '00' means no privacy code is active.
- Press the Power/Menu button again to confirm the privacy code.
For successful communication, all walkie talkies in your group must be set to the same channel and privacy code.
6.3 Transmitting and Receiving
- To Transmit: Press and hold the PTT button (or Talk button) and speak clearly into the microphone. Release the button when you finish speaking.
- To Receive: The walkie talkie will automatically receive messages when not transmitting. Ensure the volume is set to an audible level.
Image 6.1: Long Range Communication Example
6.4 VOX Function (Voice Operated Exchange)
The VOX function allows you to transmit without pressing the PTT button. When VOX is active, the walkie talkie will automatically transmit when it detects your voice.
- Press the Power/Menu button repeatedly until 'VOX' appears on the screen.
- Use the Up or Down buttons to select the VOX sensitivity level (e.g., 1-3, with 1 being most sensitive). Select 'OF' to turn VOX off.
- Press the Power/Menu button to confirm.
6.5 LED Flashlight
To activate the built-in LED flashlight, press the Lamp button. Press it again to turn the flashlight off.
Image 6.2: LED Flashlight in Use
6.6 Key Lock Function
The key lock function prevents accidental button presses, such as changing channels.
- To Lock Keys: Press and hold the Power/Menu button until a key icon appears on the LCD screen.
- To Unlock Keys: Press and hold the Power/Menu button again until the key icon disappears.
6.7 Call Tone
Your walkie talkie has multiple call tones to alert other users. To send a call tone, simply press the Call button.
Image 6.3: Call Tone Feature
7. Maintenance
- Cleaning: Wipe the device with a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners.
- Battery Care: Remove batteries if the device will not be used for an extended period to prevent leakage. Replace all batteries at the same time.
- Storage: Store the walkie talkies in a cool, dry place away from direct sunlight and extreme temperatures.
- Water Resistance: This device is not waterproof. Avoid exposure to water or high humidity.
Image 7.1: Drop Resistant Design
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Batteries incorrectly installed or depleted. | Check battery polarity. Replace with new AAA batteries. |
| Cannot communicate with other walkie talkies | Different channels or privacy codes. Out of range. | Ensure all devices are on the same channel and privacy code. Move closer to the other device. |
| Poor sound quality / Static | Weak signal. Interference. Low battery. | Move to an open area. Avoid obstacles. Replace batteries. |
| VOX not working | VOX sensitivity too low or off. | Adjust VOX sensitivity to a higher level in the menu. |
| Keys are unresponsive | Key lock function is active. | Press and hold the Power/Menu button to unlock the keys. |
9. Specifications
Voltage| Feature | Specification |
|---|---|
| Model Number | EUA9168F (RT637) |
| Brand | Retevis |
| Color | Orange |
| Number of Channels | 16 |
| Privacy Codes | 99 (CTCSS/DCS) |
| Frequency Range | 446.00625-446.09375Mhz |
| Maximum Range | 1 Kilometer (approx. 0.62 miles) |
| 4 Volts | |
| Power Source | 8 x AAA batteries (4 per walkie talkie, not included) |
| Water Resistance Level | Not waterproof |
| Product Dimensions (H x W x D) | 153 x 49 x 20 mm (approx. 6.02 x 1.93 x 0.79 inches) |
| Material | Durable PC + ABS plastic |
Image 9.1: LCD Display
10. Warranty and Support
Retevis offers a 30-day return policy for no reason and a 90-day warranty for this product. For any questions, technical support, or warranty claims, please contact Retevis customer service through the retailer where the product was purchased.
For more information about Retevis products, you can visit the official Retevis store: Retevis Store
