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Doorbell Extender, Plug In Doorbell Wireless Kit, 3/4 Mile Range 433MHz, Convert Your Existing Hard Wired Doorbell Into A Wireless Door Bell with Plug In Chimes, 95dB Flashing Light Door Bell
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Safety Technology International, Inc. STI-3300 Wireless Doorbell Extender with Receiver Connects to Existing Hardwired Doorbell, Part of Musical Wireless Chime Series - - Amazon.com
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