The nRF52840 Dongle is a compact, low-cost USB dongle for Bluetooth® low-power, Bluetooth, thread, ZigBee, 802.15.4, ANT and 2.4GHz proprietary applications using the nRF52840 SoC Dongle is the perfect target hardware for use with Connect for Desktop because it is inexpensive, but still supports all short-range wireless standards used by Nordic devices The dongle is designed to work with Connect for Desktop as a wireless hardware device For other use cases, please note that there is no debugging support on Dongle, only programming the device and communicating via USB Connect for Desktop supports nRF52840 Dongle and programming via nRFUtil.Low cost USB dongle, support for Bluetooth LE, thread, Zigbee, 802.15.4, ANT and 2.4GHz,15 GPIOs and interfaces for castellated solder joints (The product printed words depending on the batch, but this does not affect use) Color: As Shown Material: PCB Package Contents: 1 x nRF52840-Dongle Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.