... :The production is easy to install,it controled by the on-off,just need to affix the main part and ... should less than about 5mm).When someone attemp to open the open the door or windows(the ... is changed),annunciator will to make a strong sound immediately,to warn the intruder to leave.Sphere of application: ... ,cabinet,drawer,all the palce doen't allow to open for others.Main part side:Length:6. ...