Super Tiny Size Compact size allows it to be installed in various mounting boxes, including the smallest European standard. External Switch ControlEasily connect to momentary switch, door exit switch, SPDT switch, lock switch and even dry contact sensors. Detach Relay ModeMINIR4 has the "Relay Detach" mode, which means that the states of the external switches and relay are separated, so the use of the external switch button will not affect the state of the relay. eWeLink-RemoteMINIR4 is a smart switch with the gateway function "eWeLink-Remote". "eWeLink-Remote" subdevices can be added, R5 and S-MATE, after pairing with MINIR4, R5 and S-MATE can act as remote controls to control MINIR4 locally via the eWeLink-Remote signal. Safe and reliable: TÜV, CE and FCC certifications ensure a safer and more reliable product.