I tried searching for information about the GB10A, here on the forum, but it's all pretty old, some going back to before the original company folded. Does the currently available model (not the old ones), really have a sound sensor on it, or is does it just sense the glass vibrations. It seems it would be much more useful, especially in a room with many windows, if it could be mounted near, but not on the window(s), rather than sticking one on each window (or 2 if it's double hung?). They aren't exactly small either - that that aesthetically pleasing. Thanks.