Interrupt latency measured at ~15 µs on 33 MHz 486. Driver adds ~2 µs processing. Polling mode (for systems without IRQ) gives 500 Hz update rate at 1 ms polling interval.
: Open Device Manager , expand "Bluetooth" or "Mice and other pointing devices," right-click your BT5.2 mouse, and select Update driver followed by "Search automatically for drivers". bt52 mouse driver