1.SONOFF Zigbee 3.0 USB Dongle is a universal Zigbee USB stick. It can be used as a universal Zigbee gateway in Home Assistant or other open-source platforms via ZHA or Zigbee2MQTT to locally control all your Zigbee sub-devices, so you don't need to invest in the Zigbee hubs for different brands, all you need is a universal gateway - Dongle Plus! 2.The dongle plus has a wide range of supported devices, such as BASICZBR3, S31 Lite zb, SNZB01, SNZB02, SNZB03, SNZB04, ZBMINI, S26R2ZB , and various sub-devices from various brands or flash router firmware to extend the network range. 3.The limits of ZBDongle are 21 direct sub-devices and up to 40 sub-devices (Default values from official firmware). Supported to connect more by configurating yourself. *Updated version (in the near future) will be supported to work with maximum 200 sub-devices Specifications: Pre-flashed with Z-Stack 3.x.0 coordinator firmware Can use ZHA in Home Assistant or use Zigbee2MQTT Base on TI CC2652P CP2102N 20dBm output gain SMA interface external antenna Aluminum housing effectively reduces signal interference from peripherals Optional 1.5m USB extension cable for better signal range Package Included: 1*SONOFF Zigbee 3.0 USB Dongle E