Garmin Forerunner 15 Large, Black/Blue GPS Running Watch; Tracks Distance/Pace/Calories Heart Rate Monitor Optional Reminds You When It's Time to Move Rechargeable Lithium-Ion Battery; Save, Plan, Share Your Activities Online; Display Size : 0.98 x 0.94 inch (25 x 24 mm) Display Size : 0.98 x 0.94 (25 x 24 mm)