The nRF52840 Dongle is a small, low-cost USB dongle for Bluetooth Low Energy, Bluetooth mesh, Thread, ZigBee, 802.15.4, ANT and 2.4GHz proprietary applications using the nRF52840 SoC.

Highlights:

Low cost USB dongle supporting Bluetooth LE, Thread, Zigbee, 802.15.4, ANT and 2.4GHz
15 GPIO and interfaces available on castellated edge soldering points
1 Programmable RGB LED
1 Programmable green LED
1 Programmable Button
Updatable through USB DFU

Key Features:

nRF52840 flash-based ANT/ANT+, Bluetooth Low Energy SoC solution
Button and LEDs for user interaction
15 GPIO available on a castellated edge
Onboard USB bootloader with buttonless support
USB support

Relevant Resources:
User Guide