For sale, the smart watch Samsung Galaxy Watch 4 (The watch is the basic version, not the classic one Supports Google apps and electronic payment Operating System: Wear OS supports Google apps Supports Google Pay and wallet feature Size: 40 mm Health: Contains a BioActive sensor to measure (heart rate, ECG, and body composition analysis "fat and muscle percentage"). Screen: Super AMOLED type, which is one of the best screens in its price category to date Advanced health sensors: Measuring heart rate, blood pressure, and ECG. Body Composition Analysis (BIA): Measuring body fat, muscle, and water percentage (a Samsung exclusive feature). Accurate sleep tracking, blood oxygen level, and walking and sports tracking Price: 200