Samsung Galaxy Watch series specifications (general) Screen: High-resolution AMOLED, vibrant and clear colors even in sunlight Sizes: Mostly 40mm – 44mm (and sometimes larger) System: Wear OS in collaboration with Samsung Processor: Fast and runs apps smoothly Battery: Lasts approximately 1-2 days depending on usage Resistance: Water and dust resistant (often suitable for swimming) Health and Fitness: Heart rate monitoring ❤ Blood oxygen measurement Sleep tracking 😴 Calorie and step counting Some models have ECG measurement