Shelly BLU Door/Window White

I love these compact and reliable door/window sensors

I love these compact and reliable sensors. They were simple to install and provided very useful information. I am using them on Garage doors so that other Shelly devices in the house can be triggered by the opening or closing of the door.

Will the device outlast its battery this time?

The title says it. Tired of replacing these when they just go dead. At least there is never a need to change the battery, as it outlasts the device.

Excellent Quality leading edge technology!

This device is premium. I opened the box and it connected to my Homeassistant instantly.