The principle of this e-mat is to incorporate a pressure balance into the design. A timer will start when the elders stand on it. If there is a constant pressure brought to the mat stemmed from no movements or changes of centre of gravity of users, it is very likely that abnormal situations or problems have happened. As a result, the system will activate the buzzer alarm. Subsequent to futile warnings from the buzzer, the system will send an email to a designated email address to inform his family members or social workers who may arrive at the scene or call the police if necessary.