SONOFF MINI R4 Wifi Switch Module Smart Wi-Fi 2 Way Switch Smart Home Works R5 S-MATE Wireless Control Alexa Google Home MINIR4 is a mini extreme WiFi smart switch equipped with ESP32 chip, that turns traditional switches into smart switches, automating lights and electronic devices, and tiny size fits in various mounting boxes, including the smallest EU-type/86 type/120 type mounting box. MINIR4 supports external switch control and easily connects to the momentary switch, door exit switch, SPDT switch, latching switch, and even dry contact sensors.MINIR4 has "detach relay" mode, which means the states of external switches and relay are separated, so operating the external switch button won't affect the relay state. Such as, if you open detach relay" mode, when you turn off the light, your smart light won't be offline, and you still can use App to control smart lights.MINIR4 is a smart switch with the gateway function of eWeLink-Remote.After pairing with MINIR4, MINIR4 can be controlled locally by S-MATE through "eWeLink-Remote" signal, and trigger other smart devices in the smart scene. Mini than Ever, Adapts to Various Boxes A brand new product that turns traditional switches into smart switches, automating lights and electronic devices. Its 40% smaller than MINIR2, fits in various mounting boxes, including the smallest European standard ones. Ultra-fast ESP32 Chip The ESP32 chip is a highly sought-after solution for smart home products, boasting exceptional safety and reliability. With its speedy dual-core performance and ample memory, you can trust its ability to provide long-lasting and stable operation.