Sonoff 4Ch R3 Smart Switch, 4 Independently Programmable Wifi Remote Time Switch Independently control 4 devices : Just need one Sonoff 4ch R2 that can make you connect and control four home appliances and electronic devices independently. Smart remote control switch: You can check your home appliance status anytime anywhere, and control them on/off with just a click on your smart phone or tablet via WiFi via APP eWeLink. It's no limit to the distance. Share control of devices to others: You can simply share control of your home appliances to others so that they can also turn on/off the devices remotely. Set time schedules for automatic control: It has single, repeating, and countdown timers that you can use to control home appliance on/off automatically. Works with Alexa: Link "eWeLink Smart Home Fan" skill. You can directly ask Amazon Echo/Echo Dot/Amazon Tap to turn on/off your Sonoff devices. Works With the Google Assistant: Link "Smart We Link" on Google Home app, start to voice control your Sonoff devices on Google Home.(Only eWeLink advanced users have access to IFTTT,costs 9.9USD and you will enjoy a full year of the privilege)