1. Introduction
This instruction manual provides comprehensive information for the proper setup, operation, and maintenance of your Retevis EAM002 Acoustic Tube Earpiece. This 2-pin PTT (Push-to-Talk) microphone headset is designed to offer clear and private communication for users of compatible Motorola and HYT two-way radios. Please read this manual thoroughly before using the product to ensure optimal performance and longevity.
The Retevis EAM002 is suitable for a variety of professional environments requiring discreet and clear communication.

2. Package Contents
Upon opening the package, please verify that all items listed below are present and in good condition:
- 1x Retevis 2Pin PTT Mic Covert Acoustic Tube Earpiece Headset

3. Product Features
- Great Sound Quality: The remote microphone is highly sensitive, ensuring clear sound pickup and superior audio clarity for effective communication.

Figure 3: Remote microphone and PTT button for clear communication. - Transparent Acoustic Tube: Features soft earplugs for comfortable wear and enables private conversations. The transparent tube design also helps protect against radio electromagnetic wave radiation.

Figure 4: Transparent acoustic tube for discreet and private listening. - Double Metal Clips: Equipped with two metal clips, allowing you to securely fix the PTT button and the acoustic tube to your clothing (e.g., collar) for hands-free operation and optimal microphone positioning.

Figure 5: Double metal clips for secure and convenient attachment. - Soft and Durable Cable: Constructed with a strong and flexible PU wire, featuring triple reinforced protection for long-term durability and reliable performance.

Figure 6: Durable cable construction with triple reinforced protection. - Optimal Cable Length: The cable from the plug to the PTT is approximately 100cm (39.4 inches), and from the PTT to the acoustic tube is approximately 60cm (23.6 inches). The acoustic tube can be extended up to 50cm (19.7 inches), providing sufficient length for comfortable use by individuals of average size and height.

Figure 7: Cable lengths and typical wearing position.
4. Setup and Installation
- Connect the Earpiece: Insert the 2-pin plug of the earpiece firmly into the corresponding audio jack on your compatible walkie-talkie. Ensure a secure connection.
- Position the PTT Unit: Use the metal clip on the PTT unit to attach it to a convenient location on your clothing, such as your lapel or collar. This allows for easy access to the Push-to-Talk button.
- Wear the Acoustic Tube Earpiece: Gently insert the soft earplug of the transparent acoustic tube into your ear. Adjust for a comfortable and secure fit.
- Adjust Microphone Position: Use the second metal clip on the acoustic tube cable to position the microphone close to your mouth for optimal voice transmission.
5. Operating Instructions
- To Transmit: Press and hold the PTT (Push-to-Talk) button located on the remote microphone unit. Speak clearly into the microphone.
- To Receive: Release the PTT button. Audio will be heard through the acoustic tube earpiece.
- Volume Adjustment: Adjust the volume directly on your walkie-talkie unit to a comfortable listening level.
- Private Communication: The acoustic tube design ensures that your conversations remain private, making it ideal for security, retail, and event management environments.
6. Compatibility
The Retevis EAM002 Earpiece is designed for walkie-talkies with a 2-pin M plug configuration. Please refer to the plug dimensions and the compatibility table below to ensure your radio is supported.


Compatible Models:
| Category | Models |
|---|---|
| Earpiece Type | Covert Acoustic Tube Earphone For Motorola |
| Compatible for Motorola | GP Series: GP2000, GP2100, GP300, GP 308, GP68, GP88, GP88S |
| CP Series: CP88, CP100, CP150, CP200 | |
| SP Series: SP10, SP21, SP50 | |
| CT Series: CT150, CT250, CT450, CT450LS | |
| PRO Series: PRO1150, PRO2150, PRO3150 | |
| P Series: P040, P080, P100, P110, P1225, 1225LS, 2000 | |
| XTN Series: XTN446, XTN500, XTN600 | |
| XTN XV Series: XV1100, XV2100, XV2600 | |
| XTN XU Series: XU1100, XU2100, XU2600 | |
| CLS Series: CLS1110, CLS1410, CLS1413, CLS1450, CLS1450C | |
| Spirit M Series: MV11, MV11CV, MV12, MV12CV, MV21C, MV21CV, MV22, MV22CV, MU11, MU11C, MU11CV, MU12, MU12C, MU12CV, MU21C, MU21CV, MU22CVS, MU24CV, MU24CVS, MU24CVST | |
| for Motorola Spirit Series: SV10, SV11, SV11D, SV21, SV12, SV22, SV22C, SU210, SU22, SU22C, SU220 | |
| Other Series: GTI, GTX, LTS2000, VL50, VL130, PMR446, ECP100, PR400 | |
| Compatible for HYT | TC-500, TC-600, TC-700, TC-610, TC-620, TC-2110, TC-1600, TC-510 |
Notice: If your walkie-talkie type is not in the list above, please contact Retevis support with your model number for assistance in finding a suitable accessory.
7. Specifications
| Model Number | C9025A |
| Item Type | Earphone |
| Brand Name | RETEVIS |
| Material Quality | PU wire |
| Color | Black |
| Cable Length (Plug to PTT) | Approx. 100 cm (39.4 inches) |
| Cable Length (PTT to Acoustic Tube) | Approx. 60 cm (23.6 inches) |
| Acoustic Tube Length | Extendable to 50 cm (19.7 inches) |
| Two-pin Standard Diameter (Ear) | 2.5mm stereo (top pin) |
| Two-pin Standard Diameter (Mic) | 3.5mm stereo (bottom pin) |
| Space of Two-pin | 5mm (0.2 inches) |
| Weight | 34g (0.075 lb) |
| Package Dimensions (L x W x H) | 10 cm x 5 cm x 5 cm |
| Package Weight | 0.055 kg |
8. Maintenance
- Cleaning: Regularly clean the soft earplugs with a mild disinfectant wipe to maintain hygiene. Ensure the earplug is completely dry before re-inserting into your ear.
- Storage: Store the earpiece in a dry, cool place away from direct sunlight and extreme temperatures. Avoid tangling the cables.
- Cable Care: Do not pull excessively on the cables or the plug, as this can cause internal damage. Handle the earpiece gently when connecting or disconnecting.
- Inspection: Periodically inspect the cables, plugs, and acoustic tube for any signs of wear or damage. Replace the unit if any damage is observed to ensure optimal performance and safety.
9. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound from earpiece |
|
|
| Poor sound quality / Static |
|
|
| PTT button not working |
|
|
10. User Tips
- For optimal hygiene and clear audio, regularly clean the acoustic tube and earplug.
- Experiment with the placement of the PTT unit and microphone clips to find the most comfortable and accessible position for your specific use case.
- When not in use, coil the cable neatly to prevent tangles and extend the lifespan of the earpiece.
- The transparent acoustic tube is designed for discretion; ensure it is properly routed under clothing for a professional appearance.
11. Warranty and Support
RETEVIS stands by the quality of its products. The EAM002 Acoustic Tube Earpiece comes with a Lifetime Warranty from the RETEVIS Official Store, including free replacement for a year (shipping costs paid by the buyer).
For any questions, compatibility concerns not listed in this manual, or support needs, please contact RETEVIS customer service. All inquiries are typically answered within 24 hours.
Contact Information: Please refer to the seller's contact details on the platform where the product was purchased.





