We can’t find anyone else in our archive who’s made a Bluetooth dongle in this way, but we’ve certainly seen sniffing of HCI commands to reverse engineer a speaker’s communications.

The Alogic Echelon wireless Bluetooth keyboard comes in two flavors ... comes with both Bluetooth and low-latency 2.4GHz RF dongle connectivity. The PC kit is available as a combo unit with ...

The Keychron K3 Max is a compact 75% mechanical keyboard with 84 hot-swappable and low-profile switches. It can connect to host devices using Bluetooth, a 2.4Ghz wireless dongle or USB-C cable.