Installation necessity: this wifi light switch MUST work under 2.4G wifi router (Not 5G)| Neutral Wire is also necessary (white and capped inside the outlet box, please check before ordering)
3 way switch: This smart light switch work with non-smart toggle switch rocker switch to build a 3 way / 4 way circuit. Only replace one by this wifi switch
Home automation (IOT): smart home devices are compatible with Alexa and works with Google assistant for voice control (Smart Life Skill). Remote light switch via iOS and Android devices (Smart Life App). Schedule, timer switch, Sharing, IFTTT to create a smart home automation system
Specifications: 100-240VAC, 15A(Max), 50/60Hz. This wireless light switch can work in most household electricity environment.
Warranty: Martin Jerry is offering a 30-day, money-back guarantee, 1-year quality warranty for smart home devices on Amazon, like smart plug, Smart Switches, Wall Switches, Smart Bulb, Homekit smart plug