ES-35     Door Knob Alarm     ( DC 9V)

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  2 1/4 in.  speaker included )

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