【Smart WiFi Switch BASICR4】SONOFF Smart WiFi Light Switch BASICR4 is a smart switch which support APP remote control, Smart Scheduled, Group control functions. Furthermore, the smart light switch is compatible with Alexa/ Google Home/ eWelink/ IFTTT, you can voice control it via the Alexa/ Google Home, you can also remote control via eWelink APP by smartphone, or via IFTTT system by web. 【Upgrade Chip ESP32 】 Compared to SONOFF smart switch BASICR2, the smart switch BASICR4 use the upgrade the chip ESP32, enhance the basic function, and increase the performance. 【Magic Switch Mode】This switch add a new function which is Magic Switch Mode, it means you can still control the light switch through the app even turning off a traditional wall switch. No matter the wall switch or app remote control, you can enjoy the smart world. 【“eWeLink-Remote” Control】BASICR4 is a smart switch with the gateway function of “eWeLink-Remote”. You can add “eWeLink-Remote” sub-devices, use S-Mate2 or R5 to pair with BASICR4, and then set the scene, you can reach the two-way control and local control. 【Group Control】 You can set groups to control multiple BASICR4 devices at the same time for convenience. 【Safe and Reliable】 With the product’s built-in protect system, which prevents the product from deformation, melting, fire, or live devices from exposure in case of over-temperature. BASICR4 has obtained CE, FCC, ETL etc certifications， is safe and reliable.