SEHOMY 4 Pack Smart Door Sensor Alarms, WiFi Window Sensor Detector Real-time Alarm Compatible with Alexa Google Assistant, Wireless Home Security Door Open Contact Sensor for Bussiness Burglar Alert
- ...will receive an alarm signal from your phone. Home Security Alarm make House more safety.
- Easy Installation:No Need to use complicated tools when installation,just use 3M glue to install,firm and durable.The two arrows are opposite,the distance between the two compopents should be as close as possible,and the closest distance should not affect the opening/clsoing of the door or window.
- Low Power warning: The sensor door need with TWO AA Batteries(not include).When the battery level is low, it will automatically push messages throuch APP to remind you to change battery, never worry about running out of battery.