Note: 
You can view the currently installed firmware version at any time in the RFS 3 submenu under the ‘Device Info’ entry.

Step 1: 
Make sure that the RFS 3 is sufficiently charged (at least 2 of 3 bars).

Step 2: 
Download and install the official RFS 3 Firmware Updater tool from here:
Windows-Version
MAC-Version

Step 3: 
Download the latest firmware file for your RFS 3. The latest files will be posted on this support article page.
Currently, all RFS 3 variants delivered are still up to date.

Step 4: 
Open the tool.
 

Step 5: 
Switch on the RFS 3 and connect it to your Windows PC or Mac using the USB cable.

Step 6: 
Swipe down from the top of the screen
or 
press the centre menu button on the right side of the RFS 3 housing.
Press the ‘gear’ icon.
      

Step 7: 
Press ‘Device Info’.
 

 Step 8: 
Press ‘Update’. 

Step 9: 
Follow the instructions provided by the tool.
Select your language in the bottom left corner.
Click on ‘Select file’ to find the latest firmware file for your RFS 3 device.
When the message ‘Open file success’ appears, please click on ‘Update’.

After the message ‘Update device success’ appears, you can close the firmware tool, unplug the RFS 3 and the update is complete.