Garmin Descent G1 Dive Computer

General Lens Material sapphire crystal Bezel Material fiber-reinforced polymer Case material fiber-reinforced polymer QuickFit™ watch band compatible yes (22 mm) Strap material silicone Physical size 45.5 x 45.5 x 15.2 mm Silicone Band: 128-224 mm Extra Long Silicone Band: 128-373 mm Display Size custom, two-window design: 0.9” x 0.9” (23 x 23 mm) Display resolution 176 x 176 pixels Display Type monochrome, sunlight-visible, transflective memory-in-pixel (MIP) Weight 61 g Water rating Dive (100 meters) Battery life Dive Mode: Up to 25 hours Smartwatch: Up to 21 days Battery Saver Watch Mode: Up to 48 days GPS: Up to 26 hours Max Battery GPS Mode: Up to 56 hours Expedition GPS Activity: Up to 27 days Memory/History 32 MB Clock Features Time/date GPS Time Sync Automatic daylight saving time Alarm clock Timer Stopwatch Sunrise/sunset times Health Monitoring Wrist-based heart rate (constant, every second)