nRF52840 USB Key with TinyUF2 Bootloader - Bluetooth Low Energy [MDBT50Q-RX] : ID 5199 : $15.95 : Adafruit Industries, Unique & fun DIY electronics and kits
small size Nordic nRF52840 dongle BLE USB dongle bluetooth5.0 Dongle Adapter beacon for SmartHome sensors
Bluetooth PTS with Nordic nRF52840 USB Dongle – BlueKitchen