USA Timer ProThis portable training timer is multi functional, serving as a wall clock, count up timer, count down timer, and programmable interval timer. The following interval timers are pre programmed into the timer: MMA1 5 x 5 minute rounds with 1 min rest between rounds MMA2 3 x 5 minute rounds with 1 min rest between rounds TABATA 20 seconds work and 10 second rest for 8 cycles FGB 3 rounds of 5 x 1 min work and then 1 min rest In addition to these inbuilt