Hiitgo Interval Timer and Stopwatch (Programmable), Best for Crossfit, Gym, Boxing, Running, Kettlebells, Cardio, Circuit Training and Tabatha workouts. In Interval timer mode one or two intervals times between 99 minutes 59 Second; In time mode, you can set 2 groups of time alarm reminders for daily life. Auto mode keeps repeating through intervals. Chime and vibration interval notification; alarm duration can be set for one, two, five, or nine seconds. Built-in Led lighting, easy to read in a dark environment,Built-in Stopwatch and Clock feature.Waterproof :IP66. Built-in one lithium battery, 320mAh(3.7V),save battery costs For HIIT, Cross Fit, Cardio, Weightlifting, Strength Training, Tabata Training, Kettlebells, Running, MMA,Aerobic training,Yoga, Meditation,Kitchen timing, Time management and more. For run gym interval timer ,interval timer for workout,interval timer outlet,interval training,marathon, triathlon, running, boxing.