Chronometer by time intervals can be used for any sport or training either as boxing, MMA, muay thai, hit and exercise routines. key features -Stopwatch interval. -It has two modes of pre-configured intervals boxing. Possibility to edit routines pre-configured. -Add unlimited new routines. -defines the number and time intervals, -defines break time and prior to the end of the series notice. -Aviso sound at the beginning of the series, rest and notice before the end of each interval. Never enters a sleep state or attenuated, always remains on. -system circular progress bar timer type. It works even when the device is in locked mode or is in another application. -Setting language. (English, Spanish, Portuguese) -Sensor motion (shake the phone) to start, pause or resume the timer.