-Gang Radio Controlled Switch Bundle For The Switching Of Mains Power To Lighting And Appliances Up To 250W Total Load Power.The Slave Switch Operates In Conjunction With The Master To Provide 2-Way Light Switching Such As When You Want A Switch At The Top And Bottom Of A Flight Stairs For A Particular Light. Only The Live Wire Will Be Switched To The Load. Switching Is Initiated Either By Radio Control Or Manually By Pressing The Button On The Housing Of Either Of The Switches.Compatible With The Miho003 Mi|Home Remote Control And The Mi|Home Network. The Master Switch Is A Receive-Only Radio Device Operating In The 434Mhz Band. The Slave Operates By Direct Connection To The Master Switch.Connect To The Gateway For App Control. The Master Slave Switches Are Compatible With Both Amazon Alexa And Google Home As Well As Having Ifttt Compatibility. For 2-Way Applications Both Master And Slave Switches Included Alexa/Google Home Compatible (Gateway Required) Geofencing Timers And Triggers Available.1X Mihome Double Light Switch 1X Mihome Slave Switch Mounting Screws Quick Start Guide&lt;B&gt;Specification&lt;/B&gt;&lt;B&gt;Dimensions&lt;/B&gt;H95 X W182 X D46mm&lt;B&gt;Pack Size&lt;/B&gt;2&lt;B&gt;Buying Option&lt;/B&gt;2 Gang&lt;B&gt;Smart Product Type&lt;/B&gt;Smart Switches&lt;B&gt;Ifttt Compatible&lt;/B&gt;Yes&lt;B&gt;Wireless Frequency&lt;/B&gt;434Mhz&lt;B&gt;Mobile App Controlled&lt;/B&gt;Mi|Home&lt;B&gt;Mobile Alerts/Notifications&lt;/B&gt;No&lt;B&gt;Colour&lt;/B&gt;White