2.4G Hz Smart WiFi Contact Open and Close Door Window Sensor Supports Intelligent Voice Control such as Alexa Google Assistant

Features:
Instant notification to your phone immediately when door or window is opened or closed. You don't have to worry about your baby going out of house without notice, and easily know when your aged parents leave or arrive home, even can be clear when someone enters your shop,office and company reception,etc.Keeping you safe and informed all the time.
You can check whether the door/window is open with app anytime and anywhere,giving you a full sense of security.

Specification:
Material: Plastic
Colour: White
Product Size: 71x21x22mm, 40x11x11mm

Package Content:
1 x Smart Sensor
1 x Manual