A Bluetooth dongle is a small device that plugs into a computer's USB port and provides Bluetooth connectivity.It enables the computer to communicate wirelessly with other Bluetooth devices (such as wireless headphones, keyboards, mice, etc.).<br> Same functionality as nRF52840 dongle<br> Supports buttonless built-in USB bootloader<br> Including BLE application, RSSI Viewer, etc.<br> Model Number:nRF52840 dongle<br> Working Frequency:2.4Ghz<br> IC:nRF52840<br> interface:Type-A<br> Application:BLE/RSSI<br> Working Current:12mA<br> The product appearance and printed words depending on the batch, but this does not affect use.<br> Colour:As Shown<br> Material:ABS<br> Package Contents:<br> 1 * Bluetooth USB Dongle<br> Only the above package content, other products are not included.<br> 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.