I accidentally bought an Ironman watch about 10 years ago and found it is perfect for me.  The time has two settings, which is great since I travel for work.  The chronometer records my total running time or biking time or how long I'm waiting at the restaurant, etc.  The timer beeps off half laps while I'm running so I stay on pace.  The alarm is great at work; I set it for the next meeting or telcon so I won't forget.