dretec SW-123BK Stopwatch Spiel L New, Unused Includes a new Panasonic CR2032 button battery. I purchased this but have kept it in storage without using it. ● All-in-one design, suitable for any time and place ● Backlight equipped ● Waterproof IPX7 ● Stopwatch function (1/100 second measurement, lap/split function, 100 memory function) ● Timer function/Count function ● Clock function (time, calendar, alarm) ● Operation sound ON/OFF switching function ● Neck strap included ● Product size: Approximately W58 x D21 x H83mm ● Product weight: Approximately 70g (including battery) ● Power supply: Lithium battery CR2032 x 1 ● Maximum measurement time: Lap/Split: 9 hours 59 minutes 59 seconds ● Maximum set time: Timer: 9 hours 59 minutes 59 seconds (countdown) ● Maximum number of records: Lap/Split: 100 memories ● Maximum count: 99999 times ● Alarm duration: Approximately 30 seconds ● Operating temperature range: 0℃～40℃ ● Battery life: Approximately 1 year ● Backlight: Lights up for approximately 5 seconds after button operation ● Waterproof construction