Display size: 0.80"x1.13". Functions: time, date, calendar, and alarm. Battery life: up to 8 days in activity tracking mode; 13 hours using GPS. Regular fits wrist circumferences 5.39"7.68". X-large fits wrist circumferences 6.38"8.86".Accurate Fitness Tracking----Monitors sleeping habits/ Counts steps and floors climbed/ Elevate wrist heart rate technology/ Provides calories burned and quantifies intensity levels. Garmin Connect App----Works with or without a smartphone connection. The item "Garmin Vivoactive HR GPS Smart Watch Black Regular Fit Model 010-01605-03 NIB" is in sale since Tuesday, November 14, 2017. This item is in the category "Sporting Goods\Fitness, Running & Yoga\Fitness Technology\GPS & Running Watches". The seller is "buyritesource" and is located in New York. This item can be shipped to United States.