Compact interval timer times or intervals between seconds and 99 minutes. Built-in Stopwatch and Clock feature. Secure and Removable Belt-clip . Auto mode keeps repeating through intervals, up to 99 repeats. Chime and vibration interval notification; alarm duration can be set for , , five, or nine seconds. Size of a small pager. Powered by AAA battery (not ); measures 2.25 by 0.5 x 1.75 inches. Sweat and impact resistant. For use with: HIIT, Cross Fit, Cardio, Weightlifting, Strength Training, Kettlebells, Body for Life, Running, Learn-to-Run, MMA, Tabata, Boxing, Martial Arts and more.