The Hug-Time Bracelets are watch-timer like bracelets that the Trolls used to know when it was "hug-time". The bracelets blow into a flower, glows and makes a "ding" sound when it is time to hug. They went off every hour because the Trolls loved to hug every hour but at the end of the film, Poppy told Branch that "hug time" was now all the time.