Technically I would only give 4 stars but given the value for money this is a 5 star product. Quite small, "loud enough" (I'd like it louder but I'm not that deaf yet), easy to install. Ring tones are acceptable. The transmitter button is pretty easy to install with double sided tape (it's a little bigger than I expected but it fits in the space I have for it). I like that the transmitter uses a lithium button cell battery instead of a mini 12V alkaline battery. The receiver/electronic bell is a little smaller than I expected, but again it's easy to install. Let's see how durable the transmitter is when left outdoors and exposed to the midday sun.
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