Gymboss MAX YELLOW SOFTCOAT Set up to 25 different intervals and can repeat groups up to 99 times. Save up to 15 programs. Has an LCD backlit screen for using at night or in a dark room. PLEASE NOTE: Very Large Vibrate, but has a softer beep than the original Gymboss. You would be best to use the Vibrate feature and have it clipped to you if you are listening to music while you run/workout. Strong no-slip belt clip. Can be used with the Gymboss Armband or Wristband. Alarm by beep, vibration, or both. Alarm duration of 1, 2, 5 or 9 seconds. Size of a small pager. Water and shock resistant. For use with: MMA, Boxing, Martial Arts, Cardio, Strength Training, Kettlebells, Body for Life, Weightlifting, Running, HIIT, Learn-to-Run, and more.