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Door Signalers (300mHz) for use in North America
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Flashing Light lets you know someone is at the door when you cannot hear a knock or a doorbell because of background noise or a hearing loss.
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Door Signalers (433mHz) for use in most Countries outside of North America
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Flashing Light lets you know someone is at the door when you cannot hear a knock or a doorbell because of background noise or a hearing loss.
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