"A lesson in using premium keywords on a disposable-grade product."
The '120H Playtime' is the theoretical maximum with ANC off and volume low. With ANC on at normal listening levels, expect closer to 40-60 hours, which is still substantial but not the headline figure.
This is a candidate for a backup pair to live in a travel bag, a first headphone for a child, or for anyone who frequently loses or breaks their gear. The price is the primary feature; all other specs should be considered secondary bonuses.
Anyone seeking genuine audio fidelity or effective noise cancellation should look elsewhere. For double the price, brands like Anker Soundcore offer a vastly more competent and honest product that actually delivers on its core promises.