Motion-Triggered Lights Your connected lights guide you through the dark by turning on automatically when you enter and turning off when you leave. All thanks to the equipped sensitive PIR sensor and professional fresnel lens for wide range and high accuracy. Smart Energy Saving If you enter a room during the day, the built-in ambient light sensor prevents the lights from automatically switching on. To save more energy, set your lights to dim to appropriate brightness levels. Intuitive and Simple Design Besides the Kasa app, your family can also physically interact with the smart dimmer for manual control.