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Have you ever gone without locking the window ?
The locking device is at the handle that opens the window and therefore, the red is seen to display unlock when the window is open with the person’s hands. Also, it is locked with the push when closed. With such features, there are no worries of having to close windows and you are able to check to see that your windows are locked from far away with the green color.
Using Signal Window, The house can be protected from the thief and dangerous elements. And outside the window, it is safe because it does not see the lock.
Asan, South Korea
Cheonan-si, South Korea