RF-DG-40A is a USB dongle developed to be used as a wireless hardware device together with nRF Connect for Desktop or the Wireshark.The dongle support programming the device and communicating via a USB port. You can use the dongle to help you develop your end products.
The RF-DG-22A is a development kit based on Siliconlabs EFR32BG22C224 chip. The dongle gateway can be used to capture the wireless signal from bluetooth devices. And it further acheives the real-time monitoring for BLE Beacon device.
RF-DG-32B is a USB dongle with a small size developed for BLE data capture. You will need a Dongle Sniffer to start a quick analysis of the BLE broadcast data.