Note: SNZB 01/02/03/04 must be used with Zigbee Bridge. SONOFF ZigBee Bridge Pro SONOFF Zigbee Bridge Pro is the updated Zigbee bridge that enables you to manage up to 128 sub-devices with larger capacity and stability, plug-in devices can act as Zigbee routers to extend the network range. SONOFF Zigbee Bridge Pro newly added features like smart home security, local smart scene, and easy arm and disarm. You can customize 3 modes by setting different arming devices. The local smart scene always works well even Wi-Fi is disconnected. Built-in high-precision local RTC, a short power outage will not affect the time synchronization. Time schedule can return work once power restoration. Note that the local scene is for Zigbee devices only. SONOFF ZBMINI-L smart switch, S26R2ZB smart plug, SONOFF Zigbee wireless switch, and sensors like temperature and humidity sensor, motion sensor, and wireless door/window sensor can be connected with the Zigbee Bridge Pro to give you more possibility to create various scene linkages. It can also command Alexa, Google Assistant and SmartThings to voice control your home. Make Zigbee and Wi-Fi Devices Communicate SONOFF bridge operates Zigbee 3.0 protocol, is designed to communicate data between Zigbee and Wi-Fi devices to realize smart control and connection. Manage Up to 128 Zigbee Devices One bridge can add up to 128 sub-devices, plug-in devices can act as Zigbee routers to extend the network range. Customize Your Home Security Mode Customize 3 modes by setting different arming devices.