1. Product Overview
The TIDRADIO TD-M15 is a global Push-to-Talk Over Cellular (POC) radio designed for unlimited distance communication. It operates on 4G networks and comes with a global SIM card, offering extensive coverage for various activities such as hiking, camping, and professional use.


2. Setup and Activation
2.1 SIM Card Installation
- Push the SIM card slot latch downward to open it.
- Place the SIM card into the slot with the metal contacts facing down.
- Close the latch.
- Gently push the latch upward until it clicks into place to secure it.

2.2 Powering On the Device
After installing the SIM card and battery, long press the back button to turn on the device.
2.3 Odmaster App Download and Account Registration
To use the full functionality of the TD-M15, you must download and install the Odmaster App. The device cannot be used in an unbound state.
- Open your device's App Store (iOS) or Google Play Store (Android).
- Search for "Odmaster" and install the application.
- Register an account and log in. You will need to agree to the User Agreement and Privacy Policy.

2.4 Device Registration/Binding via App
Follow these steps to bind your TD-M15 radio to your Odmaster account:
- Open the Odmaster App and navigate to the "Program" interface.
- Click on "Add PoC Radio".
- Select "M15" from the list of models to open the QR code scanning page.
- Scan the QR code displayed on the startup screen of your TD-M15 radio.
- Wait for a moment to complete the activation. You can customize the device name during this process.

2.5 Activation Tutorial Video
3. Operating Instructions
3.1 Device Layout

3.2 Button Functions
| Button | Function |
|---|---|
| PTT button | Press and hold to transmit signal, release to end transmission. |
| MENU button | Enter menu/confirmation option. |
| EXIT button | Return / Power on / Off. |
| [▲] button | Increase volume (on home page) / Select menu option. |
| [▼] button | Reduce volume (on home page) / Select menu option. |
| Upper side button | Directly jump to the group list page. |
| Lower side button | Directly jump to the user list page. |
3.3 Menu Functions
I. Group Call
Users in the same group can communicate via the radio. Press the MENU button to enter menu options, then press the MENU button again to enter group selection. Use the [▲] and [▼] buttons to select a group, and press the MENU button to confirm the operation.
II. Member Single Call/ Group Call
One-to-one or one-to-many calls are available. Press the MENU button to enter menu options, then press the MENU button again to enter the member selection page. Use the [▲] and [▼] buttons to select a member or several members, press the MENU button to confirm your operation, and click the PTT button to make a single call to a member or a group call to selected members.
3.4 Lighting Instructions (LED Indicator Light)
| Status | LED Indicator Light |
|---|---|
| Transmitting signal | Red light normally on |
| Receiving signal | Green light normally on |
| Standby | Breathing light turns green once every 5 seconds |
| Charging | Red light normally on |
| Fully charged | Green light normally on |
3.5 Group Management via App
The Odmaster App allows for comprehensive group management:
- Quickly Add Group: Click on the device in the app to enter its detail page, then click the "+" icon and select "Quick Add". Choose the group you wish to join and click OK.
- Exit Group: Press and hold the group you want to exit, then click OK to delete it.
- Note: The app is for group management (add/delete/modify/view groups). Joining a group in the app does not automatically switch the radio's active group; this still requires operation on the radio itself.

3.6 Adding Friends via App
You can add friends to your network through the Odmaster App:
- Scan to Add: Click the "Scan" button and scan your friend's user QR code. Once successfully added, they will appear in your friend list.
- Search to Add: Click the "Add Friends" button, then enter the ID or nickname in the input box to search and add.
3.7 APN Settings
To configure APN settings:
- In the Odmaster App, go to [My] > [APN].
- Select to connect to your "TD-M15-xxxx" Bluetooth device.
- After successful connection, click the "Query" button. The page will display the APN information on the device.
- Click "APN" to modify the information as needed.
3.8 Unbinding Device
To unbind your TD-M15 from your account:
- Enter the communication-device page in the app.
- Select the bound M15 device to enter its detail page.
- Click the "Unbind" button, then click "OK" to confirm.
Note: After successful unbinding, the radio will be restored to factory settings, and these settings will take effect after it is restarted.
4. Maintenance
To ensure optimal performance and longevity of your TIDRADIO TD-M15, follow these maintenance guidelines:
- Cleaning: Use a soft, damp cloth to clean the exterior of the radio. Do not use harsh chemicals or abrasive cleaners.
- Storage: Store the radio in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: Avoid fully discharging the battery frequently. Charge the battery regularly, even if the radio is not in active use, to maintain battery health.
- Antenna: Do not touch the antenna area unless necessary.
5. Troubleshooting
If you encounter any issues with your radio, refer to the solutions below. If the problem persists, contact support.
5.1 Poor Signal Received
Possible Reasons:
- Weak network signal in your current location (e.g., basement, dense building areas).
- Radio waves are difficult to transmit effectively.
- Network congestion (e.g., high network traffic during peak hours, leading to call failures).
Solutions:
- Move to a location with better network coverage.
- Avoid using the radio during similar periods of high network traffic, or wait a moment and try again.
5.2 Echo or Noise
Possible Reason: Poor network relay lines from some network operators.
Solution: Turn off the radio and then restart it. This will allow it to automatically search for base stations and switch to a network with better quality.
5.3 Shortened Standby Time
Possible Reasons:
- Standby time is influenced by the network operator's system settings. Different network operators may result in varying standby times.
- Battery running down due to use in high-temperature environments.
- Continuous signal emission to search for base stations when the radio cannot connect to the network, consuming battery power.
Solution: If you are in an area with a weak signal, temporarily turn off your radio to conserve battery.
5.4 Unable to Connect to the Network
Possible Reasons:
- Data allowance on your SIM card has run out.
- Poor signal or being outside the service area of the network server.
Solutions:
- Ensure you have a valid SIM card with an active data plan.
- Move to a more open area or closer to a window if indoors, and try again.
6. Specifications
| Parameter | Value |
|---|---|
| Product Name | TIDRADIO |
| Product Model | M15 |
| DC Charging Voltage | DC 5 V / 1 A |
| Battery Capacity | 3000 mAh |
| Operating Voltage | 3.7 V |
| Weight | 150 g |
| Dimensions | 95*50*25 mm (3.74 x 1.97 x 0.98 inches) |
| Frequency Range | 446MHz |
| Frequency Band (CN) | B1/B3/B5/B8/B34/B38/B39/B40/B41 |
| Frequency Band (EU) | B1/3/5/7/8/20/28B38/40/41 |
| Frequency Band (LA) | B2/3/4/5/7/8/28/66 |
| Operating Temperature Range | -10~+55 °C |
| Storage Temperature Range | -40~+85 °C |
| Audio Output Power | <2 W |
| Output Power(w) | 0.5w-3w |
| Waterproof / Water-Resistant | No |
| Material | Plastic |
| Is_Display | Yes |
| Maximum Range | >50km |
| Certification | CE, FCC |
7. Safety Precautions
- Safe Power-on: Do not turn on the radio where its use is prohibited or may cause interference/danger.
- Traffic Safety: Comply with traffic rules. Prioritize traffic safety while driving.
- Interference: All radios may be subject to interference affecting performance.
- Hospitals: Comply with all restrictions; turn off near medical devices.
- Airplanes: Comply with all restrictions; turn off as the radio may interfere with aircraft.
- Refueling: Do not use the radio at gas stations or near fuels/chemicals.
- Blasting Sites: Do not use the radio in areas where blasting operations are conducted.
- Maintenance: Only qualified personnel are allowed to install or repair this radio.
- Accessories and Batteries: Only use approved accessories and batteries.
- Device Connection: When connecting to other devices, ensure they are matched.
- Reasonable Use: The radio should be used in a normal position. Avoid touching the antenna area unless necessary. When transmitting, keep the microphone at least 3 cm away from your mouth.
7.1 FCC Compliance Notice
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
8. User Tips
- Global Coverage: The TD-M15 is designed for global communication. Ensure you select the correct regional version (e.g., USA/CA/MX or EU/UK) for optimal network compatibility in your area.
- Data Plan Management: The radio includes 1 year of free data. After the first year, an annual fee of approximately $20 applies. Monitor your data usage and renewal status through the Odmaster App to avoid service interruptions.
- Easy Setup: Leverage the Odmaster App for quick and easy setup, including SIM card activation, device binding, and group management. The app simplifies the process significantly.
- Battery Life: To maximize battery life, especially in areas with weak signal, consider temporarily turning off the radio when not in active use.
9. Support Information
For further assistance or inquiries, please contact:
- Support Email: support@tidradio.com
- Demonstration Videos: You can find demonstration videos by searching for "M15" on YouTube or visiting www.youtube.com/@tidradio.
- User Manual (PDF): A detailed user manual in PDF format is available.