*App Support: Free iOS and for Android mobile App eWeLink. Remote ON/OFF: Turn connected 433MHz RF devices on/off remotely from anywhere on the App.*Convert 433MHz RF Remote controller to App via WiFi. Make 433MHz RF devices App remote controllable.*Supports adding up to four 433MHz RF Remote Controller/ RF Curtain Switch / RF Alarm. Supports control up to sixteen 433MHz RF devices.*Timing: Supports scheduled/delayed timing tasks to turn on/off at specified time. Voice Control: Compatible perfectly with Amazon Alexa and for Google Home.*The receiving supports fixed code 433 frequency, like PT2260, PT2262, PT2264, EV1527, etc.