[akira2501]

Bluetooth Low Energy with some Logitech sauce added into it. Apparently encrypted and marketed for use in contexts where FIPS level security would be required.

[shim__]

It's bluetooth 5 with more tx power as far as I understand

[Ghoelian]

According to their website(1), the bolt is BLE, and the unifying receiver used a proprietary 2.4GHz radio signal.

(1) https://support.logi.com/hc/en-us/articles/1500012483162-Wha...