I've bought (and returned) several wireless doorbells at Lowes and Home Depot. This one was by far the easiest to set up and install, and the first ringtone is classic ("Ding-dong, Ding-dong!"), clear, loud, natural, and resonant. (The other 51 ringtones are quite stupidly cell-phone-ish, in my opinion.) I like it so much that I've ordered an additional receiver to install at the back of the house so my somewhat hearing-impaired partner is sure to hear it.
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