by Everspring, Model Number: HSM02
This sensor detects and wirelessly reports the opening of a window or door. It also reports the current status: open or closed.
It's battery powered so no messy wires to look at.
When a window or door is opened, the sensor will report this and your Smartified Home hub will notify you via email or a notification on your smart phone. If you have a camera in the vicinity, a picture can be taken as well.
Everspring web site