Gymboss Interval Timer and Stopwatch Watch Strap &ndash; Black NOTE - THIS LISTING IS FOR THE WATCH STRAP ONLY. TIMERS ARE SOLD SEPARATELY. Quick, secure attachment: Wear your Gymboss Timer like a watch. Any Gymboss model with a removable belt clip will snap securely in place on this high quality watch strap. This strap allows the Gymbosss vibrating alarm to be fully transmitted to the users wrist. Perfect for runners or other users who want to easily monitor time or rounds remaining during activity. Also ideal for coachs or others who regularly use the stopwatch feature of the Gymboss. Now comes in one size fits all! Fits size 5  - 9  inches ( 146mm  235mm). High quality, perforated band allows breathability but is also strong and durable. All hardware is black stainless steel. Quick and easy insertion and removal. 100% Satisfaction Guarantee. 1 year warranty against defects.