SEIKO Stopwatch With case Stored at home for a long time. Operation has been confirmed. Please understand that this is a used item and consider purchasing it! [Official Product Description] ◯ Time Calculation Function You can perform calculations in the sexagesimal system using the hour, minute, second keys and the numeric keypad. Example: 3 minutes 50 seconds + 2 minutes 30 seconds = 6 minutes 20 seconds ◯ Stopwatch Function 1-second measurement, 100-hour timer ◯ Timer Function The timer can be set in 1-second increments up to a maximum of 99 hours, 59 minutes, and 59 seconds. Since there is no sound when the time is up, it can be used with peace of mind in music and broadcasting production environments. It displays the elapsed time after the time is up, which is convenient for managing lost time. You can also check the elapsed time from the start of measurement with one touch while counting down.