After 2016, when Bluetooth connectivity was introduced with the second controller revision (Model 1708) alongside the Xbox One S, Microsoft rebranded its proprietary connection protocol as "Xbox Wireless".
[10] Xbox Wireless uses a higher frequency than Bluetooth (2.4 GHz), improving bandwidth and lag. Starting in 2017, Microsoft began working with third-party manufacturers to produce additional accessories using Xbox Wireless, with the first class being headsets.
[11]
With a firmware update that began rolling out in September 2021, controllers with Bluetooth are able to pair with devices using both wireless protocols, allowing those controllers to switch connections by double-tapping the pairing button