For the committed exerciser, this watch offers a training program that gives you weekly targets, including intensity and duration. Great for cross-training fitness enthusiasts, including swimmers. Comes with a heart-rate sensor that attaches to a fabric chest strap. Brand: Polar Dial Color: Gray Strap: Black silicone Clasp: Buckle Movement: Quartz Water Resistance: 30m Case Width: 36mm Case Thickness: 8mm Bracelet Dimensions: 200mm long, 23mm wide Model No.: 90051012 Special Features: Stop watch; alarm and snooze; dual time zone; button lock; coded transmission prevents interference from other training computers; manually set target zone; built-in fitness test monitors fitness improvement; adaptive and personalized Polar STAR Training Program; weekly history; training files for 100 events with summaries; compatible data transfer to PCs, Mac and Polar software Jewelry photos are enlarged to show detail.