1. Download the Pulsar Fusion software along with the 4K Wireless Pairing tool :
2. Connect the 4K dongle to your computer.
Please connect ONLY the dongle you want to pair with the PC. If you connect multiple dongles.
3. Run the pairing tool program.
4. Press and hold the buttons as shown in the image for 3 to 4 seconds, and the LED indicator will then blink in yellow.
5. Click on the "Pair" button
* Moreover, in the event that the pairing fails
1. Please update the dongle firmware using the attached file (Nordic_4K_Receiver_V1.21.exe)
2. Try re-pairing the mouse with the dongle.
3. Check if it is working properly.
When switching from the 4K dongle to a regular dongle, you will need to repeat the pairing process.