Product Details:Heart Rate MonitorGrey and Black Resin StrapINDIGLO® night-lightWater Resistant to 50mSize: MediumAdditional Features:One-Year WarrantyAlarm Features30 lap recall2.5 Year Battery LifeHeart Rate Monitor:Preset your desired heart rate zoneDisplays average heart rate over a period of timeAmount of time spent within selected heart rate target zoneComputes calories burnedMeasure heart rate