NRF52840 USB DONGLE is a USB tool based on the NRF52840 chip produced by Norwegian NORDIC. The NRF52840 chip is a wireless multi-protocol SOC with an ARM CORTEX M4 core. It supports the common 2.4G private protocol, Bluetooth 4.0 4.1 4.2 Bluetooth 5, ANT+, NFC and other mainstream protocols, comes with a USB interface. NRF52840 has low power consumption, simple development, diverse internal peripherals, high integration, and fast computing speed. Therefore, it has been widely welcomed by the market since its release. In order to meet the needs of developers who need Bluetooth peripherals to communicate with PCs, the company developed this NRF52840 USB DONGLE TOOL tool. This USB DONGLE onboard PA+LNA is suitable for Bluetooth long-distance communication.