This large bulb with E27 fitting easily changes the color temperature via voice control from the free Calex app. Go from bright morning light to warm evening light in no time for cozy evenings. Connect the lamp to WiFi and choose from more than 100 colors, set timers and create every conceivable routine to optimize your living pleasure. These smart lamps work on a normal wall switch and via WiFi. Not on a dimmer switch. Via the Calex smart remote control and the free Calex app you can connect these lamps to WiFi and set them to the desired ambiance. USPs - Connection via WiFi - Easy installation - Ready to use in 3 simple steps - 100+ RGB color options - CCT: 1800-3000K (white color) - Dimmable via app and remote control