NOTE - THIS LISTING IS FOR THE WATCH STRAP ONLY. TIMERS ARE SOLD SEPARATELY. This is a high quality watch strap that allows you to wear your Gymboss Interval Timer on your wrist like a watch. Any Gymboss model with a removable belt clip snaps securely in place for use during almost any type of exercise program. It is especially useful for runners or others who want to easily monitor the time or rounds remaining. Also perfect for coaches or others who regularly use the stopwatch feature of the Gymboss. Fits size 5 ¬æ - 9 ¬º inches ( 146mm - 235mm).