This 4-Pack Of Emylo Wifi Motion Sensors Is Compatible With Google Assistant And SENSITIVE MECHANICAL DETECTION?128º field of view for multi-angle and 20ft range for wide-area.Sensitively sense weather and location changes,set up a single control or one-key execution,set up your own timed commands,sensing all kinds of movement,detecting the duration of human movement and whether the human body has passed by,and make a notification in the set commands. SCENE LINKAGE?Use Smart Life App/Google/Alexa to create favourite scene program,which will be triggered when motion is detected in the set scene.When the appropriate commands are set,such as "Welcome Home,""the lights turn on automatically",and when motion moves it triggers the corresponding command.When coming home,Alexa will read the welcome and turn on the light automatically,realising scene linkage and helping the realisation of smart life. PIR MOTION DETECTOR ALERT?Wireless motion sensor - motion detector is an important intelligent assistant in a home security system.When not at home,you will be notified if a suspicious person enters the room in order to keep it safe.Also if you set up temperature and humidity change or weather change commands,you can receive real-time notifications about gardening,greenhouse,and wine temperature detection exceeding or falling below the command for remote monitoring. WIRELESS MOTION SENSOR?Easy installation-Pairing when red light blinks.Long battery life durable power-2 AAA batteries typically last up to 2 years.Low power alarm-when the battery power is low,the app will alert you to replace with new batteries.Family sharing function - enables the whole family to take control and share. SERVICE TIPS?60 Days Refund and Return Guarantee Provide 24-hour Customer Service.Please read the instructions!After installing the battery, pairing when the red light blinks,if pairing fails, use the pin to reset and pair again!Faster pairing near wifi!Welcome to contact us if you have any questions!