5 mode multifunctional fitness timer Features 5 modes including a built in custom training mode; supports UP target timing, DN countdown, and editable timing durations; timing can be set in minutes, seconds or milliseconds with 0.01 second accuracy; includes a 12/24 hour clock with switchable display; metronome helps keep a steady rhythm. Interval training timer Program and store exercise and rest intervals; ideal for gym training, group workouts, or home fitness sessions. 1.5 inch LED digital display Large, clear LED display with contrast that is easily viewable from a distance; buzzer provides audible reminders for timed intervals. HD large screen display HD LED display with crisp numbers; five brightness levels adjustable to improve readability at distance and in different lighting conditions. 23 practical use scenarios Circuit training class: set up a sequence of work and rest intervals, save the configuration, and repeat rounds without reprogramming. home workouts: create tempo based routines with the metronome to maintain pacing throughout the session. Gym group training: coordinate rounds for multiple participants with audible reminders and precise timing to keep the class on schedule.