If you lose your USB dongle, use the Razer Mouse Pairing Utility to connect a replacement. How to Install Razer Synapse Follow these steps to set up your software correctly: Razer Basilisk V3 X HyperSpeed | RZ01-0487 Support & FAQs
Razer Synapse 4 (Note: While many users still use Synapse 3, Razer has begun transitioning support to Synapse 4 for improved performance and stability).
To fix cursor jitter or connection issues, download the Official Firmware Updater (RZ01-03150) .