The "75270" refers to a QDID (Qualified Design ID) registered with the Bluetooth Special Interest Group (SIG). This designation is associated with Bluetooth 5.0 adapters that utilize specific chipsets, including the Barrot (BR80XX or BR200X series) or generic "CSR" drivers. These are cost-effective, plug-and-play modules designed to work with native OS drivers rather than needing dedicated third-party software. Microsoft Learn The Core Problem: Missing/Faulty Drivers
If the adapter is not recognized automatically on older Windows versions: Driver Update Software: Launchstudio.bluetooth.com Listingdetails 75270 Driver
5.0 (though it may be marketed as such even if the hardware varies). The "75270" refers to a QDID (Qualified Design