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, and mice. Same functionality as nRF52840 dongle Supports buttonless built-in USB bootloader Includes BLE application, RSSI Viewer, and more Model Number: nRF52840 dongle Working Frequency: 2.4GHz IC: nRF52840 Interface: Type-A Application: BLE/RSSI Working Current: 12mA Product appearance and printed text may vary by batch, but this does not affect performance Color: As shown Material: ABS Package Contents: 1 x Bluetooth USB Dongle Note: Only the items listed are included. Light reflection and different displays may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.