What's Jakcom R4 Smart Ring?

The Jakcom R4 is a multifunctional RFID smart ring and a successor to the R3 model. It can simulate contactless RFID cards such as your access card, membership card, parking card, and shopping card. You can also program the ring as a travel pass or a car key.

In addition, the ring’s NFC module enables it to serve as an extension to your mobile device by recognizing virtual calls and scene notifications. The Jakcom R4 can also share notes, business card details, and other cloud-based information.

Like the R3, this NFC smart ring is passive, which means it does not die or need charging any more. The Jakcom R4 is also IP68-rated, so it’s dust and waterproof.

Virtual Call

The Jakcom R4 allows the user to trigger timed incoming calls on supported Android and iOS devices. Just make sure to get your ring near your device to start the call. 

Scene Notification

The ring can also quickly set off multiple preset notifications on supported Android and iOS devices. For instance, you can set emergency messages and instantly trigger it by inching your smart ring closer to your phone.

Information Sharing/Exchange

The Jakcom R4 allows you to store and share cloud information, including encrypted texts, electronic business cards, website pages, network disk files, and more.

product functionalities
Product categories
Sleep Tracking and Improvement
Meditation Aid
Stress Level Monitoring and Management
Heart Rate Measurement and Monitoring
Blood Oxygen Sensor
Sleep Apnea Screening
Step Counter for Activity Tracking
Public Travel Pass
Yes
Contactless Payment
Yes
Access Card/Badge
Yes
Smart Key (home, buildings, cars)
Yes
Log in Device for Smatphones, Laptops, Online Accounts, etc.
Yes
Passwordless Login (e.g. FIDO2 WebAuthn)
Yes
Two Factor Authentication (2FA) Support
Yes
Motion Controlled Pointer or Mouse
Motion Control for Music Player Apps
Motion Control for MIDI devices/software
UV Radiation Tracking
Personal Safety - Panic button
Smartphone App Notifications (Social Media, Calls, Messages)
Yes
Phone Extension - speed dial, phone calls
Yes
Voice Assistant Controller
Portable Data Storage and Sharing
Yes
tech specs
Bluetooth for Wireless Connection
Gyroscope Sensor
NFC - Near Field Communication
Yes
RFID - Radio Frequency ID
Yes
Accelerometer Sensor
Heartrate Sensor
Blood Oxygen Sensor
Proximity Sensor
Body Temperature Sensor
Electrodermal (Skin) Conductivity Sensor
Light Indicator
Action Button
Yes
Microphone(s)
Haptic/Vibration Indicator
Yes
Loudspeaker
Ultra Violet (UV) Radiation Sensor
Fingerprint Scanner
Memory chip
Yes
Water Resistance
1.5 meters
Battery Life/Passive device with no battery
Passive device
Charging Method
Passive device
Smartphone and Computer Operating System (OS) Support
Android, iOS, Windows
product availability
Is the product available for purchases?
Yes (from $20 / €16)