When emergency thing happened， such as intruder doing violence， user’s pathological changes， earthquake etc， press the panic button to give a alarm help. It is usually to put aside sitting room or living room where can be touched easily. For the industries such as bank， post office， store and so on. It can be widely used in houses， offices or public places， like theatres， airports， restaurants， hotels.<br> Artistic outward appearance<br>Alkaline 23A battery， low-power alert<br>433Mhz<br>It can be heard within 50m<br><br> <br><br /><img src="http://img6.eachbuyer.com/x13/p43/l37774601_1.jpg" />