Sonoff 4CH Pro 433MHz Remote Control + WiFi Smart Timer Switch, Interlock Self-locking, 3 Working Modes, Compatible with Alexa and Google Home, Support iOS and Android 1. Support AC DC Voltage and remotely turn onoff the connected lightsappliances by iOSAndroid App eWeLink or 433MHz RF Remote. You can use WiFi to remote control 4 devices separately. 2. It is a 4 gang WiFi switch. It supports switching among 3 working modes: interlockself-lockinginching(0.25-4s adjustable) mode. 3. The smart socket can create 8 enabled singlerepeatcountdown timers to automatically turn onoff at the specified time. The timers can run themselves even when network is unavailable. 4. To let the devices be controlled by your family, you can simply share the devices to families and give specified timers permissions. It also support create some scenes or smart scenes to trigger ONOFF the switch. 5. Compatible perfectly with Amazon Alexa, Google Home.You can directly ask Amazon EchoEcho DotAmazon Tap to turn onoff Sonoff 4CH Pro.