User Guide
User Guide Conventions
To assure your satisfaction with your purchase, please read 
this user guide we have prepared just for you. The following 
icons are used to convey specific types of information:
Very important information (can save you time!)
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Good to know info but may not apply to you
Mostly unimportant (it’s ok to breeze past it!)
Thank you for purchasing YoLink products! 
Whether you are adding additional YoLink products 
or if this is your first YoLink system, we appreciate 
you trusting YoLink for your smart home & 
automation needs. Your 100% satisfaction is our 
goal. If you experience any problems with your 
installation, with our X3 Temperature Humidity 
Sensor or if you have any questions that this manual 
does not answer, please contact us right away. See 
the Contact Us section for more info.
Thank you!
Eric, Mike, John, Ken, Clair, Queenie
Customer Support Team
Welcome!
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