Zigbee is a set of wireless communication protocols that allows the creation of personal area networks (PAN).
It is characterized by its reduced energy consumption and low data sending rate.
Zigbee networks have limited range without adding more devices, so Zigbee devices must be within 10-20 meters of each other at all times.
SONOFF Zigbee 3.0 USB Dongle Plus is a universal Zigbee USB device.
It can be used as a universal Zigbee gateway on Home Assistant or other open source platforms via ZHA or Zigbee2MQTT to locally control all your Zigbee subdevices, so you don't have to purchase different Zigbee for different brands
The Plus dongle has a wide range of compatible devices, such as SONOFF BASICZBR3, SONOFF S31 Lite ZB, SONOFF SNZB01, SONOFF SNZB02, SONOFF SNZB03, SONOFF SNZB04, SONOFF ZBMINI, SONOFF S26R2ZB and various sub-devices of various brands or flash router firmware to expand the reach of the network.