Review on ⏲️ PAICLOUD Digital Kitchen Cooking Timer - 3 Channels, Count Up/Down Timer, ON/Off Switch Stopwatch, Adjustable Volume Alarm, Magnetic Back, Stand, Battery Included by Kristin Bell

I ordered this timer, delivered on October 6, 2021 and after 1.5 months it stopped working properly. Many times the buttons didn't work. and install , and when they do it adds seconds in addition to minutes, when I press the minutes button it happens in each of the 3 timers, ugh it lasts about 2 weeks so I've only used it for a month I will be returning I don't have the little one in the box anymore, do I need the box for a return or do I just hand it in at the counter with the return slip?