How to Use: It can be used after booting, the specific operation can refer to the manual. Specification: Item Type: Electronic Stopwatch Material: ABS Model: HS 8200 Colour: Black Battery Type: Built in 160mAhAG13 Button Battery (included) Accuracy: 1/100 second Functions: 2 line display, 20 lap memory Stopwatch maximum measurement (9 hours 59 minutes 59.999 seconds) Countdown function Clock and alarm functions 12/24 hour clock Count function Package List: 1 x Electronic Stopwatch 1 x Manual