GARMIN HRM-RUN, 010-10997-12, Unit dimensions (LxWxD): 23.5"- 56.0" x 1.2" x 0.5" (60.0 - 142.0 x 3.0 x 1.2 cm), Size adjustment: Bi- fold, Battery: CR2032, Battery life: Up to 1 year (approx. 1 hour per day), Water rating: 5 ATM
GARMIN HRM-RUN, 010-10997-12, Unit dimensions (LxWxD): 23.5"- 56.0" x 1.2" x 0.5" (60.0 - 142.0 x 3.0 x 1.2 cm), Size adjustment: Bi- fold, Battery: CR2032, Battery life: Up to 1 year (approx. 1 hour per day), Water rating: 5 ATM