Voice Control SYLSTAR smart bulb work with Alexa Echo, Echo Flex, Echo Dot, Echo Plus or Google Home Assistant. Control these WiFi bulbs via your voice, it doesnt need a HUB or Bridge. For example, you can say, "Alexa, change smart light bulbs to yellow!" or "Ok Google, turn on the lights!" Remote & Group Control Keep smart light bulb connected with 2.4Ghz mode router WiFi network (5Ghz is not current supported). You can control bulb remotely when you are away from home. Group control function allows you to control several bulbs at the same time. You need to install a free SmartLife App (iOS & Android available) on your mobile device. Millions of Colors Make your space more colorful with SYLSTAR Multi-Color Smart Bulbs. Choose from 16 million colors and soft white to instantly change the atmosphere of your room. Change colors with your smartphone/tablet or voice commands really unleash your creativity. Create lighting scenes for party, reading and leisure activities. Dimmable & Energy Saving SYLSTAR smart bulbs brightness can be adjusted from 1% to 100%. It utilizes LED lighting technology, only 7 Watts of power, but its equivalent to 60 Watts traditional incandescent bulb, saves up to 80% in electric bills and its lifespan is up to 30,000 hours. SYLSTAR Smart Light Bulb is compatible with free smart apps.