SONOFF BASICR4 WiFi Switch DIY Universal Breaker Relay Moudle Timer Smart Home Magic Switch Mode eWeLink Wirele Remote Control BASICR4 is a newly upgraded WiFi smart switch equipped with an ESP32 chip. BASICR4 not only enhances the basic features but also elevates performance, all while maintaining an affordable price.Compared with BASICR2, BASICR4 has three new functions, Magic Switch Mode, Auxiliary Overheating Protection, and "eWeLink-Remote" Control. BASICR4 has "magic switch" mode, which means you can still control the light switch through the app even turning off a traditional wall switch (Note: *Only compatible with mainstream brands of double pole rocker switches. The rear-end light needs to be compatible with mainstream brands of LED,energy-saving lamps, and incandescent lamps ranging from 3W to 100W).BASICR4 is a smart switch with the gateway function of eWeLink-Remote. Using S-Mate2 or R5 to pair with BASICR4, then set the scene, you can reach the two-way control and local control.With the product's built-in temperature sensor, the real-time maximum temperature of the entire product can be detected and speculated, which prevents the product from deformation, melting, fire, or live devices from exposure in case of over-temperature. The BASICR4 not only has CE, FCC, etc basic certifications but also paed the more authoritative ETL certification.BASICR4 has all the most basic functions, APP remote control, voice control, timer, power-on state, and other functions. You can control your home appliances anytime, anywhere, and also create a variety of smart scenes to facilitate your life. Master Lighting at Your Fingertip Unlock the world of smart homes starting with BASICR4 at worth cost. No matters the wall switch or app remote control, you can enjoy the smart world. Control is one hand away. Convenient Enough, Responsive Enough Feel free to experience the convenience. Using the S-MATE2 or R5 pair with BASICR4 and set the scene, you can reach the two-way control and local control. Connection, and then Automation You can't focus on your reading because the room temperature is too high? Set a smart scene when the temperature is over 26.5, the fan will turn on automatially. Wake up at midnight and want to check out your baby? Don't worry about disturing your kids when you click the switch. Just set a smart scene so that when you pa by, the light will turn on. More Ways For More Poibilitie Explore a smart home journey that belongs to you. Features: ESP32 ChipNewly upgrade the chip, enhance the basic function, and increase the performance while keeping a reasonable price.Magic Switch ModeYou 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 ControlBASICR4 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 ControlYou can set groups to control multiple devices at the same time for convenience.Safe and ReliableWith the products built-in temperature sensor, the real-time maximum temperature of the entire product can be detected and speculated, 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.