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Wireless Doorbell, BO YING Waterproof Door Bell, Easy Install, Operating at 1000ft Range with 38 Melodies to Choose, Adjustable Volume and LED Flash,1 Push Button(Battery included)&1 Receiver,Black - - Amazon.com
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SadoTech Wireless Doorbell - Two 1-button wireless doorbell ringer & receiver, battery operated doorbell, portable for home, office, classroom, and apartment. (Baby Blue) - Walmart.com
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