【Model Number】T49961 Quartz (Battery-powered) Indiglo Night-Light Water resistant for daily use Materials: Stainless steel / Nylon I purchased this on Amazon around the time of the COVID-19 pandemic? I have thrown away the box and instruction manual. I wore it for work for about a month, but after that, it was stored in a dark room. It is still running, but I cannot guarantee its operation for a long period (as I don't know the remaining battery life). Please understand and consider purchasing.