From the manufacturer

HIIT IT.

Simple interval timers and no charging ever with our Timex Ironman T300.

Performance Pacer

A built-in audible tracker beeps when target splits are achieved. Rise above or fall below your predetermined goals, and varying chimes indicate your performance without slowing-up to look at your wrist.

Interval Timers

Define your own repetitions for high intensity and rest periods to make complex workouts automatic. Save and repeat your custom interval workouts right on your watch.

Hydration & Nutrition Alerts

With time as your most fierce competitor, it’s easy to lose track of your vital needs. Alarms remind you to refuel at regular intervals to top off essential reserves. Your body needs plenty of water for optimum performance, and Ironman distances require replenishing nutrients.