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The Global Door Beacon, model 303, is a flashing light door signal designed to alert people with hearing disabilities to knocks on doors. The portable device emits multiple flashes of light per knock. This device can be permanently attached to a door using the included screw or Velcro or it can be used as a portable device and moved from room to room. The included hanging bracket enables the unit to be hung over any door. POWER: Uses one 9-volt battery.
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