ES-35       Door Knob Alarm     ( DC 9V)

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Hangs on the door knob of any wooden or pvc door.  When a visitor or burglar touches the door knob from outside the room
or house, the kit beeps continuously.  
Powered by a 9V battery.   ( A miniature loud speaker included )

Applications :  burglar alarm, visitor chime,...  (NOTE: not suitable for metallic doors)