Smart Dimmer enable on/off and dimming light control throughout a switch circuit utilizing a Free STARFISH app. Measuring 4.53" x 2.76" x 1.72" a single gang plate is included, and neutral wire is required for connection. Dimmer switch is rated for use with up to 450W of Incandescent or 150W of LED loads. Voice Control: Pair with Alexa, Hey Google, Siri. No Hub needed. Convert lighting on a switch circuit to smart lighting and small appliances to smart on/off and dimming control with STARFISH Free App. Easily convert your up your existing home lighting products to smart products and pair with Android or iPhone devices for hands-free voice control and to work with schedules and routines. Use with STARFISH scheduling feature to automate operation or schedule as part of a routine. Use voice control with your STARFISH products. STARFISH connects with Alexa, Hey Google and Siri for convenient hands-free operation. No hub needed. Use voice commands like "Turn off the lights." "Dim the lights to 50%." Or "Set Family Night." Without lifting a finger. Connect to your home anywhere in the world through your secure STARFISH app login. Set your home's schedules from afar, make certain your home is lit to welcome you back, and if you have guests, they can connect to, through their own login. You set the parameters, you are in control.