Note: HS200 series are NOT dimmer switches (For dimmer options, please check out TP-Link\'s HS220 series); Single-pole switch that requires neutral wire and 2.4GHz Wi-Fi connection to work; Standard lighting wall box (at least 2 inches deep) Easy guided install: No need to understand complex switch wiring or master vs auxiliary switch configurations; The Kasa app includes detailed, easy-to-follow instructions that guide you through step-by-step installation Control from anywhere: Monitor your light status, Turn electronics on and off from anywhere with your smartphone using the Kasa app, whether you are at home, in the office or on vacation Voice control: Enjoy the hands-free convenience of controlling the lights in your home with your voice via Amazon Alexa or Google Assistant, perfect for times when your hands are full or entering a dark room Scheduling: Use timer or countdown schedules to set your smart switch to automatically turn on and off while you\'re home or away, Enable ‘away mode’ to randomly switch on and off to trick potential intruders Trusted and reliable: Designed and developed in silicon valley, Kasa is trusted by over 4 million users, UL certified for safety use TP-Link offers Free 24/7 technical support. Input Voltage: 100 - 120 VAC, 50/60 Hz, 15 A Neutral wire required