The CC2531 USB Dongle supports a PC interface to 802.15.4 / ZigBee applications. The dongle can be plugged directly into your PC and can be used as an IEEE 802.15.4 packet sniffer or for other purposes. With the CC2531 USB Firmware Library available on the web you can develop your own software to utilize this part. To program the debugger, the CC Debugger Can be used. The USB dongle can be used as a reference module for prototyping USB devices and for testing the RF performance of CC2531 with a small size PCB antenna.
To run zigbee2mqtt for the control of SONOFF Zigbee products in your home automation system, a CC2531 USB dongle integration is recommended. The CC2531 USB dongle is a fully operational USB device which provides a PC interface to IEEE802.15.4 / ZigBee applications, and comes with a CC2531ZNP-Prod firmware, the dongle can be plugged directly into your PC/Raspberry etc used as a Zigbee packet sniffer.
Yup, it is a ready-to-go CC2531 USB dongle for zigbee2mqtt application