Please note: ZigBee Dimmer Switch must be used with a ZigBee gateway! It cannot be used without a ZigBee gateway, Thank you! ZigBee Dimmer Switch Module: APP Remote Control:Control the switch anywhere/anytime via phone APP Voice Control:Simply give a voice command to Alexa or Google Home to control your devices. Timing/countdown/schedule:Smart and DIY your daily life to maximum extend Stepless Dimming:Dim your lamp brigntness from 0% to 100% for different scene:sleeping,working,watching movie,party etc Group-Control Function:Multi dimmer switch in different room can be set in a group realize group control function. Family Share Function:Create a smart home together with your family member Easy to install:Compatible with 98% of Installation box Material: plastic colour: Yellow Specification: 2CH Package Contents: 3 x Dimmer Switch Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.