The STW515 is a digital stopwatch and clock. This stopwatch has a 12 or 24-hour clock format and a customizable alarm with an hourly chime. It also includes three stopwatch modes: Elapsed Timer, Split Time, and Two Competitor Timer. The lighting is suitable for viewing at night or in dimly lit places, and it switches off automatically after five seconds. The calendar displays the day, month, and weekday.
| Alarm | Yes |
|---|---|
| Calendar | Yes |
| Snooze | Yes |
| Stopwatch | 3 modes |
| Timing Capacity | 23 hrs, 59 mins, and 59.99 secs |
| Timing Capacity Accuracy | ±3 seconds/day |
| Certifications | CE |
| Dimensions | 68 × 77 × 19 mm (2.6 × 3.0 × 0.8 in) |
| Power | 1 × CR2032 (1.5 V) battery |
| Warranty | 2 years |
| Weight | 56 g (2 oz) |
