Thank you for viewing! # This is a study timer I used a few years ago during my exam period. (Dretec Time Up T-587) ★ Includes instruction manual It has stopwatch and timer functions. The sound can be adjusted in 3 levels, and it can also be set to silent. It can be locked to prevent the timer from starting accidentally if touched. (When locked, the buttons will not respond.) The original battery from when it was purchased is included, so please use your own battery. ★ As shown in the attached photos, there is a melted area on the back (where tape was attached), but I confirmed that it works without any problems. Please purchase with the understanding that this is a used item. ★ We are sorry, but we cannot offer discounts. ★ We will not respond to comments requesting discounts.