Garmin Forerunner 101. Form factor: Fixed. Display resolution: 100 x 64 pixels, Display size (HxV): 36.6 x 23.4 mm (1.44 x 0.92 "). Width: 8.28 mm, Depth: 2.3 mm, Height: 4.35 mm. Battery life (max): 15 h, Battery type: AAA