1. Introduction
The Jakcom R4 Smart Ring represents the fourth generation of smart ring technology. It integrates multiple RFID chip modules, enabling it to simulate up to four contactless RFID cards simultaneously. Crafted from micro-crystal Zr ceramics, the ring boasts exceptional durability, being four times harder than aluminum alloy, and offers a smooth, jade-like touch. It is designed to be waterproof and dust-proof with an IP68 rating, ensuring reliability in various environments. The R4 operates without the need for charging, drawing power from the radio energy of read-write equipment, making it a convenient and maintenance-free accessory.
The ring supports both Android and iOS platforms for its NFC cloud services, allowing for direct use without requiring a dedicated application installation for basic functions.
2. Key Features
- Multi-frequency Card Simulation: Capable of simulating IC and ID cards across a wide range of frequencies (125KHz to 13.56MHz), including access cards, elevator cards, parking cards, time cards, membership cards, and transportation cards.
- NFC Cloud Services: Built-in NFC modules allow for direct use on Android and iOS devices without app installation for certain functions.
- Virtual Call: Quickly trigger a timed call on your mobile phone to discreetly exit social situations.
- Scene Notification: Trigger multiple preset notifications on your mobile phone.
- Information Sharing: Share encrypted text, business cards, web pages, and network disk files.
- Memo Sharing: Utilize a dedicated notepad for consumption lists, to-do lists, shopping lists, and 'burn after reading' notes.
- SOS Functionality: Send SOS messages and location messages for personal safety.
- No Charging Required: Powered by the radio energy of read-write equipment.
- Durable Material: Micro-crystal Zr ceramics offer high scratch resistance and a premium feel.
- Waterproof & Dust-proof: IP68 protection grade.
3. Specifications
| Parameter | Detail |
|---|---|
| Model Number | R4 |
| Carrier Frequency | 13.56MHz, 125KHz |
| RF Distance | 1 ~ 3cm |
| IC Module Type | UID |
| ID Module Type | T5577 |
| NFC Module Type | Ntag213 |
| Ring Material | Ceramics (Micro-crystal Zr ceramics) |
| Protection Grade | IP68 |
| Operating Temperature Range | -50°C ~ +80°C |
| Smart Card Type | Not Recorded (as per product attributes) |
4. Size Selection
To ensure optimal comfort and functionality, it is crucial to select the correct ring size. Follow these steps to measure your finger and choose the appropriate size:
- Measure with a Fine Line: Use a fine, non-elastic line (e.g., thread or thin paper strip) to wrap around the base of your finger.
- Tighten Slightly: Gently tighten the line around your finger. Avoid overtightening, as this may result in an oversized ring.
- Measure Length: Straighten the measured line and use a ruler to determine its length in millimeters.
- Consult Size Chart: Refer to the 'Ring Model Contrast Table' below to find the corresponding ring size based on your measured perimeter.
| Size | Perimeter (mm) |
|---|---|
| 8 | 57.1 |
| 9 | 60 |
| 10 | 62.8 |
| 11 | 66 |
| 12 | 70 |
5. Initial Setup
The Jakcom R4 Smart Ring is designed for ease of use with minimal setup for its core NFC functionalities. For advanced features, a companion application may be required, though the product highlights direct use for NFC cloud services.
5.1 Basic NFC Functionality
For simulating IC/ID cards and using NFC cloud services (like sharing text or web pages), the ring often works directly with compatible card readers or NFC-enabled smartphones without requiring a specific app. Simply place the ring near the NFC/RFID reader or the NFC area of your smartphone.
5.2 Advanced Features Setup (Potential App Requirement)
While some NFC cloud services are app-free, features such as Virtual Call, Scene Notification, Memo Sharing, and SOS functionality may require a dedicated Jakcom application to configure and manage. Please check the manufacturer's website or your device's app store for the official Jakcom R4 companion app and follow its specific setup instructions for these advanced features.
6. Operating Instructions
6.1 Card Simulation
The R4 Smart Ring can simulate various types of IC and ID cards. To use, simply place the ring close to the compatible card reader. The ring's multi-frequency capabilities allow it to interact with different card systems.
- Access Cards: Use the ring to gain entry to buildings or restricted areas.
- Elevator Cards: Activate elevators by presenting the ring to the reader.
- Parking Cards: Use for entry and exit at parking facilities.
- Time Cards: Clock in or out at work or school.
- Membership Cards: Access member benefits or services.
- Transportation Cards: For public transport systems where compatible.
6.2 NFC Cloud Services & Information Sharing
The R4 allows for quick and easy sharing of information between the ring and NFC-enabled smartphones.
- Text Messages: Share encrypted text messages by tapping the ring to a compatible phone.
- Business Cards: Quickly share your personalized business card information with others.
- Web Pages & Network Disk Files: Share links to web pages or files stored on network drives.
6.3 Virtual Call
To trigger a virtual call, configure the feature via the companion app (if required). Once set up, a specific gesture or tap with the ring can initiate a timed fake incoming call on your phone, providing a convenient way to excuse yourself from situations.
6.4 Scene Notification
Similar to the virtual call, scene notifications can be configured through the companion app. This allows the ring to quickly trigger multiple preset notifications on your mobile phone, useful for reminders or discreet alerts.
6.5 Memo Sharing
The ring can be used to quickly open a dedicated notepad on your mobile phone for various lists and notes. This feature likely requires the companion app for configuration and synchronization.
- Consumption List
- To-do List
- Shopping List
- Burn After Reading (for sensitive notes)
6.6 SOS Functionality
For emergency situations, the R4 Smart Ring can be configured to send SOS messages and location messages. This feature provides an additional layer of safety and peace of mind, especially during travel or in potentially dangerous situations.
7. Maintenance
The Jakcom R4 Smart Ring is designed for durability and low maintenance due to its advanced materials and lack of internal battery.
- Cleaning: Wipe the ring with a soft, damp cloth to remove dirt or smudges. Avoid harsh chemicals or abrasive materials that could damage the ceramic surface.
- Durability: The micro-crystal Zr ceramic material is highly resistant to scratches and wear, making it suitable for daily use.
- Water & Dust Resistance: With an IP68 rating, the ring is protected against dust ingress and can withstand immersion in water up to 1.5 meters for 30 minutes. However, prolonged exposure to harsh chemicals or extreme water pressure should be avoided.
- No Charging: The ring does not require charging, eliminating battery-related maintenance.
8. Troubleshooting
8.1 Card Simulation Issues
- Ring not detected by reader: Ensure the ring is placed within the 1-3cm RF distance of the reader. Some readers may require a specific orientation.
- Card type not recognized: Verify that the card you are trying to simulate is compatible with the R4's IC (UID) or ID (T5577) modules, and that the reader operates on 13.56MHz or 125KHz frequencies.
- Inconsistent performance: The R4 features a newly designed circuit structure that reduces electric field disturbance and increases transmit-receive distance compared to previous generations. If you experience issues, try adjusting the ring's position relative to the reader.
8.2 NFC Cloud Services & App-Related Issues
- Information not sharing: Ensure your smartphone's NFC is enabled and the ring is placed correctly over the phone's NFC antenna. For advanced features, confirm the companion app (if applicable) is installed and configured correctly.
- App not functioning: If using a companion app for features like Virtual Call or Memo Sharing, ensure the app is up-to-date and has necessary permissions on your device. Restarting the app or your phone may resolve minor glitches.
8.3 Payment Functionality
The Jakcom R4 Smart Ring is capable of simulating various types of access, membership, and transportation cards. However, its ability to function as a payment card (e.g., for credit/debit transactions) depends entirely on the specific payment system and whether it supports the ring's underlying IC/ID/NFC module types for secure financial transactions. The product specifications do not explicitly list support for standard payment card emulation. Please consult with your payment service provider or card issuer for compatibility information if you intend to use the ring for payment purposes.
9. User Tips
- Discreet Exits: Utilize the Virtual Call feature to create a plausible reason to leave social or business situations gracefully.
- Enhanced Safety: Configure the SOS Message and Location Message features to provide an extra layer of security, especially when traveling or in unfamiliar environments.
- Professional Networking: Leverage the Business Card Sharing function to quickly and efficiently exchange contact information, leaving a memorable impression.
- Digital Organization: Use the Memo Sharing feature to keep track of shopping lists, to-do items, or sensitive notes with the 'Burn After Reading' option.
- App-Free Convenience: For basic NFC cloud services, remember that the R4 can often be used directly with Android and iOS devices without needing to install a specific app.
10. Warranty and Support
For detailed information regarding warranty coverage, technical support, and service, please refer to the official Jakcom website or contact the retailer from whom you purchased the product. Keep your proof of purchase for any warranty claims.
