The Sonoff S-MATE is a battery-powered remote, so it does not require a neutral wire in the mounting box.
S-MATE can connect to ordinary 1/2/3-button wall switches, acting as a remote controller.
One MINIR3 can connect more S-MATEs, and One S-MATE can be added to 3 MINIR3.
After pairing with MINI R3, S-MATE can locally control MINI R3 through the eWeLink-Remote signal and trigger other smart devices in the smart scene. S-MATE is compatible with almost any switch type, such as pulse switch and rocker switch, allowing you to convert your existing switch into a smart one.
Sonoff S-MATE is the module that can transmit the eWeLink-Remote signal. We also named it eWeLink-Remote sub-devices. The device that receives eWeLink-Remote is MINI R3, and we call it the eWeLink-Remote gateway. Once you add S-MATE to any eWeLink-Remote gateway (such as MINI R3 or M5), it can not only locally control all products within the eWeLink-Remote gateway without a network connection but also control any other Sonoff smart device in the smart scene when there is a network connection. It is eWeLink-Remote Control, you can click this post to learn more.
Features:
eWeLink-Remote Control Use it with the MINI R3 or other smart switch with the gateway function of eWeLink-Remote, it can achieve eWeLink-Remote control.
Control Ways Control built-in eWeLink-Remote gateway devices when no Internet is available, and it can trigger other smart devices in the smart scene when there is a network connection.
Compatible With Switch Types S-MATE is fit for almost any switch type, like, pulse switch, rocker switch, change your existing switch into a smart one.
Switch Mate Works with MINI R3 smart switch, M5 smart wall switch and S40/S40 LITE smart plug.