APP:tuya or Smart life 1.Saving Energy:Ultra low power consumption and save over 90 percent energy cost by replacing 50W halogen bulb, and low energy consumption as well as high durability, only 5 Watt with average 50000 hours life expectancy. 2.Voice Control:Our smart led light bulbs are compatible with Amazon Alexa,Google Assistant yandex alice for easy voice control.Just control it via your voice to turn on or off or dim or brighten your light, even switch your light to specific color as you desired.No hub required and easy to install.NOTE:WiFi smart led light bulb only supports 2.4 GHz Wi-Fi network. 3.Long Range Remotely Control:You can control WiFi GU10 bulb anywhere you like if you have an internet connection.When you are outside,you don't have to check whether every lamp is off or not,just one-tap control on your Smart Life Tuya App. 4.DIY Color:White light warm light, light and dark adjustment, 16 million colors RGB full color adjustable,easily changed by your mood.You can change the color from red to green,even change the light from dim to bright. And the bulb can be used anywhere you need colorful light with smart control.Such as home,hotel,meeting room,restaurants,bar,cafe, holiday decoration,birthday party.Intelligent scene linkage, preset scene one-click execution to meet your different demand. 5.Timer or Schedule:Number of hours to turn off the light automatically can be set.Like you can set the cycle time (24 hours).Then the light would turn on and off automatically every day,which changes our lives and makes life more convenient. 1.Q:Is a hub required to connect the downlight A:No,there is no need of a hub. 2.Q:Does it work with Google Home A:Yes,it is also compatible with Alexa for easy voice control. 3.Q:If the light has been powered off by the wall switch,will it retain its settings when power back on A:Yes,the light will keep the setting as before for the memory function. 4.Q:Can this be used manually(without wifi) with a dimmer switch A:No,it can't.It can only be dimmed via Smart Life App. Specifications: Base:GU10 Wireless type: Wi-Fi 2.4GHz Rated power:5W Voltage: AC90-250V 50 or 60Hz Color : RGB 2800-6200K C W Dimmable:Yes System Supported:IOS or Android Luminous Flux:350lm Service life: >50000H Package Included: 1xSmart LED Bulb 1xUser Manual