1. Wiring according to the 3-Way / 4-Way Wiring Diagram;

2. Make sure both Mater & Add-on Switches can manually control

    (If not, go back to step 1)

3. Download the App "SmartLife" and pair it with WiFi.

    (2.4G ONLY, cannot support 5G, 802.11 av)

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Following steps are for new users:

4. Control by App when Smart Phone is under 4G (NOT WiFi)

    (If not, check the Internet of your Wi-Fi router)

5. Enable "Smartlife" skill on Alexa / Google Assistant

    How to enable skills?

6. Use voice command to control it via Echo / Google Home