<p>[Compatible with Traditional Switches]It can not only keep the original roller shutter switch, but also make traditional roller shutters intelligent, which can make your life more convenient while reducing costs. Also suitable for electric curtains, electric awnings, etc., saving you money. Size: 39*39*15mm.</p> <p>[Percentage Opening System]This WiFi roller shutter switch s been re-optimized to allow the shutters to be opened more or less, thus allowing more precise control according to everyone's needs. Note: Make sure the shutter is fully closed and paused, enter the time you want it to fully open (within 90 seconds) and the calibration is complete.</p> <p>[RF Remote Control(No WiFi Required)]The 2nd generation maxcio roller shutter module s a new wireless remote control, which does not require an internet connection. Indoor control distance up to 50 meters. The RF remote control contains a CR2430 button battery.</p> <p>[Voice Control]The smart roller shutter switch is compatible with Amazon Alexa (Amazon Echo / Dot / Spot), Google Home and Siri. For example, you can use the command: Alexa, turn the steering wheel on / off. and Alexa, open the curtain 50%. etc. Note: You need to enable the skill in Alexa or Google Assistant.</p> <p>[Timer and Sre Function]After setting the timer in the app, the alexa roller shutter switch will automatically turn on or off as scheduled to realize home automation. You can sre the control of the connected roller shutter switch with the whole family. is committed to providing its customers with the best service. If you ve any questions, please feel free to us by at the after-sales service.</p>