Easily set for 2 or 3 minute workout period, Set between round length to 30 seconds or 1 minute with the flip of a switch, Capped lighting system visually indicates where you are at all times, (Green = workout, Yellow = 30 seconds left in round, Red = between rounds, ) Extra loud round bell can be heard in any gym - complete with 30 second end of round warning whistle, This is the best in gym training timers, SKU: AMBERSG073