and Stopwatch (Programmable), Best for Crossfit, Gym, Boxing, Running, Kettlebells, Cardio, Circuit Training and Tabatha workouts.

A great little interval timer that comes in handy for Tabatas, EMOM workouts, or my tried-and-true (and much feared) 45 second on, 15 second off core extravaganzas - or anything else you can imagine. I'm a fitness coach and mostly use the Hiitboss with my clients at the gym. Unfortunately the beep (even the "high" setting) is almost impossible to hear in a loud/busy gym, so I always include the vibrate feature (but then still need to tell my client that the time is up). I do most of my own conditioning workouts in the pool, but once a week I jump rope. Instead of using a timer app on my iPod or phone (which I use to listen to music while working out), the Hiitboss comes in handy here. It's straightforward to use and makes a very welcome addition to my gym gear bag. Highly recommended!

Relatively easy to use. I am using it now and it works great for interval training. Would be nice if it had memory programs so you don't have to reprogram for different timing but for the price it does the job and it doesn't take that long to reset.

I purchased this to work on my running times. It took several re-reads of the instructions to figure out how to set it up, but I finally did it. The buttons are big and easily managed while running. I've used it for intervals and for ttacking my steps per minute. Glad I have this now.

I was very excited to use this since I do HIIT all the time but I find it very complicated and not user friendly at all. The directions aren't written clearly and does not help me figure out how to set interval times. I am thinking about returning it.

Other people seem to like this product but mine, ordered as new and not marked as otherwise, arrived with no instruction sheet and a battery installed with no insulator and in the wrong direction, and won't power on even with the battery installed correctly or with a fresh battery of my own. Previous return? Horrible quality control? Defective? All of the above? Who knows? I guess I'll try a different brand.

The timer works fine, but with all of the computer technology in the world today I can't believe they can't make this easier to program. It is complicated and laborious to enter the intervals. I set it and don't want to take the time to ever change it. This would be much better if they made it easy to program.

The Hiitboss Interval Timer and Stopwatch is a full on trainer.This device keeps my workouts timed to the second, especially excellent for the intervals. I like how it can be set to countdown for the interval time I need, then automatically goes into another countdown which I use for the rest periods in between. I don't need to look or even think about it, as the audio beep keeps the intervals, rest periods, and sets, in perfect check.I recommend this device, which easily clips onto clothing, for outdoor workouts, intervals, Crossfit, TRX, etc. A must have for getting the most productivity and gains out of any workout.

Use for running and interval training. Easy to program and change settings. Loud enough to hear while running in traffic areas. You won't feel the vibration while running, so audible tones are key. Has held up well too as I have dropped it a few times.