The perfect workout companion, this watch keeps you on track with fitness improvement and fat burning. Heart-rate-based features are shown on a large, easy-to-read display for you to gauge your intensity and stay within your target zone. Great for cross-training enthusiasts, including swimmers. Comes with a heart-rate sensor that attaches to a fabric chest strap. Brand: Polar Dial Color: Black Strap: Black silicone Clasp: Buckle Movement: Quartz Water Resistance: 30m Case Width: 35mm Case Thickness: 9mm Bracelet Dimensions: 200mm long, 22mm wide Model No.: 90051049 Special Features: Stop watch; date and time display; alarm and snooze; dual time zone; button lock; coded transmission prevents interference from other training computers; calculation of calories burned; calorie counter; graphical target zone indicator; manually set target zone; hands-free check of time of day; calculation of point where main effect of training turns from fat burning into fitness improvement; online account for analyzing training program Jewelry photos are enlarged to show detail.