McDonald's potato timer. I bought this on Mercari before, but I only checked the "tilorin" sound once and haven't used it since, so I'm selling it. From the time I received it, the SET button sometimes doesn't respond well unless pressed a little firmly, and there's some black stuff on the battery cover. The SET button works when pressed, so please understand this before purchasing. Please refrain from buying if you are looking for a perfect item. Operation confirmed on January 27th. There is no box or instruction manual, so I will wrap it in bubble wrap for shipping. Please be sure to read my profile!!