SmarDeer WiFi Door sensor Color:White The connection button can use

The connection button can use the host as a doorbell

250 x 60mm

Wireless Frequency: 2

Closure Type: Hasp

Function: Stand Support & Full protection

SmarDeer WiFi Door sensor Color:White The connection button can useWhen the door window is opened or closed, an instant notification will be pushed to your phone immediately. Even if you are away from home, you can check whether the door window is open anytime and anywhere through the app. When someone opens or closes your door or window, an alarm will be triggered to keep you informed. Support viewing open close records in the application. When the battery power is low, it will automatically remind you to replace