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Amazon.com: Door Chime, Besimlive Wireless Door Open Alarm Contact Sensor 1,000 ft Range 58 Chimes 5 Adjustable Volume Door Ringer Alert for Home/Business When Entering, Grey, 1 Plug-in Receiver + 1 Transmitter :
KERUI Wireless Doorbell Door Bell Chime 5 Volume Levels 60 Chimes Door Bells 1000ft Long Range Doorbell Kit with LED Flashing - Amazon.com
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GE Wireless Doorbell Kit, Battery Operated Receiver, 2 Push Buttons Door Bell, 8 Melodies Doorbell Chime, 4 Volume Levels, Classroom Doorbell, 150 Ft Range, White, 19297 - Amazon.com
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TECKNET Wireless Doorbells for Home, IP65 Waterproof Classroom Door Bell Ringer Wireless with 60 Ringtones & 5 Level Volume, 1300ft Range Self-Powered Doorbell Chimes Kit with LED for House - White - Amazon.com
