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. It also supports the function of eWeLink-Remote. After pairing with MINIR4, MINIR4 can be controlled locally by S-MATE or R5 through eWeLink-Remote signal, and trigger other smart devices in the smart scene.