Bought this 4-pack of Kasa Smart Lights. Only used 2 for about 3 months before deciding they weren't working for me. My loss is your gain! Bulb Shape Size A19 -- Brightness Dimmable: With a dimming range from 1% up to 100%, the Kasa Smart Light Bulb, Dimmable helps you set the right brightness for any mood or activity such as kitchen light, reading light, living room light or bedroom lamp -- Special Features: Dimmable, Energy Monitoring -- Voice Control: Get hands-free control of your lights with your voice via Amazon Alexa or Google Assistant. Perfect for times when your hands are full or entering a dark room. -- Remote Control and Away Mode: Control your smart light bulb from anywhere with your smartphone using the free Kasa smart app (iOS, Android); Dim, turn on or off or change the colors of your light bulb remotely at your fingertips. Enable ‘away mode’ to randomly switch on and off to trick potential intruders. -- Energy Monitoring and Scheduling: Monitor real-time energy usage. Drive down energy consumption without losing quality (60 W equivalent). Use timer or schedules to set your lights to automatically turn on and off whenever you want, such as waking up with a soft glow in the morning with sunrise offset. -- Trusted and Reliable: Designed and developed in Silicon Valley, Kasa is trusted by over 6 Million users. UL certified for safety use. 2-year warranty. Require 2.4GHz Wi-Fi network connection.