52840 Dongle is a low-cost BLE debugging tool. The chip used is Nordic's Soc chip nRF52840-QIAA. Dongle's main role is to work with the desktop version of nRFConnect. Users can use the desktop version of nRF Connect to familiarize develop and test Bluetooth low energy devices. Users can use the desktop version of nRF Connect to familiarize develop and test Bluetooth low energy devices. With a transparent shell it is easy to carry. It can be used as a development and debugging tool with the desktop version of nRF Connect.