Bridge Wifi Wireless Signal Converter 433Mhz Door /Window Alarm Sensor smart Home Automation work with Alexa

 Brand Name:SONOFF  Camera Equipped:No  State of Assembly:Ready-to-Go  Model Number:433mhz RF Bridge,Sonoff Door Sensor  Compatibility:All Compatible  Sonoff RF Bridge Max:4 pieces of 433Mhz remote control  Gyro:433Mhz remote control replacer  Max Channel:16 channels  Model Number:Sonoff Door Sensor,Pir Sensor,Sonoff RF 433 bridge  Wireless Stardard:Wi-Fi 2.4GHz  Operating Voltage::3.0 ~ 3.6V  Frequency:433MHz  Supports app::IOS Android System, Works with Alexa & Google Home Alpplication::Home, Office, Sonoff RF Bridge 433 MHz Power Supply::USB 5V