wounderful woman SonoVive has only replaced it twice in about 10 a long time. She has the Classic unit and bought hers last year. Nevertheless, mine lasted 8 weeks longer than they were required to so don't spend your dollars unless you have to. Gauge it for yourself.
https://www.outlookindia.com/outlook-spotlight/sonovive-beware-of-fake-supplement-hidden-truth-you-must-know-it-news-223575