A Bluetooth dongle is a small device that plugs into a computerand 39 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.).Same functionality as nRF52840 dongleSupports buttonless built-in USB bootloaderIncluding BLE application, RSSI Viewer, etc.Model Number:nRF52840 dongleWorking Frequency:2.4GhzIC:nRF52840interface:Type-AApplication:BLE or RSSIWorking Current:12mAThe product appearance and printed words depending on the batch, but this does not affect use.Colour:As ShownMaterial:ABSPackage Contents:1 x Bluetooth USB DongleOnly 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store