The Kasa Smart Dimmer Switch Hs220P3, Single Pole, Needs Neutral Wire, 2, Pack. With the smart Wi Fi dimmer, you can control the ambiance of any space with the push of a button. A quick tap of the switch toggles lighting to the previous level and built in up down dimmer buttons let you fine tune lighting to match your mood or activity. Because it?s a TP Link smart switch, you can easily control it from anywhere using the Kasa app or your favorite voice assistant device. Easy Guided Install: Neutral Wire is required, standard wall plate size. No need to understand complex switch wiring or master vs auxiliary switch configurations; The Kasa app guides you through easy step by step installation. Need 2.4GHz Wi-Fi connection. Input Voltage: 100 - 120VAC 60Hz 0%-100% Dimming with Scheduling: Adjust desired brightness with the button or Kasa app. Tailor your lighting to fade on with a click of the switch or a double click to gently fade off the lights while your child drifts off to sleep. Set light schedules for waking up with a soft glow in the morning. Voice Control: Enjoy the hands-free convenience of controlling the lights in your home with your voice via Amazon Alexa or Google Assistant. Control from Anywhere: Monitor and control your lights status from anywhere with your smartphone using the Kasa app, whether you are at home, in the office or on vacation.