SONOFF ZBMINI L2 Single Fire Dual Control Intelligent On/Off Switch Module Cell Phone Remote Voice Control Switch1. Compact size, can be easily installed in the concealed box, suitable for most of the switch box 2. Simple, reliable and easy to retrofit, no need to install flash extinguishers 3. Support external switch 4. Support dual control switch wiring, without affecting the use of wall switches 5. Intelligent timing, according to your work and rest time settings automatically turn on and off the lights 6. Wireless protocol: Zigbee 3. 0 7. Input Output: 100