This RF BridgeR2 433 can convert most of the 433.92MHz RF Remotes into WiFi wireless. By adding the RF wireless Bridge to iOS/Android App eWeLink WiFi wirelessly, You can add up to 16 RM433 RF or alarms, also add them together (max. 16 items). One 4 button remote controller can learn 4 devices, which means 64 devices supporting 433 MHz frequency can be added on the app through WiFi/2/3/4G network. It can be used for most of the 433.92MHz RF Remote controlled products, like RF controlled switch, RF controlled socket, RF controlled bulb, RF controlled door opener, etc. You can set totally 8 schedule/countdown/loop timers to turn on/off the RF controlled products.  Even more exciting is that it will work with the 433.92MHz door magnetic sensor, 433.92MHz human body IR sensor, and more other 433.92MHz sensors to realize security alarm, and allowing you to DIY smart scenes. Note that the alarm push only comes in the owner's account, those users being shared can't view the alarm push. The RF BridgeR2 can work with SONOFF DW2-RF wireless door/window sensor that allows users to set the smart scene for the sensor and the device to be controlled, then when you open the door, the device will be triggered on