<p data-start="384" data-end="836">The Xiaomi Watch S4 in <strong data-start="407" data-end="416">Black</strong> brings a premium, modern, and versatile smartwatch experience with an elegant, minimalist design suitable for both professional and active lifestyles. Featuring a <strong data-start="580" data-end="608">1.43-inch AMOLED display</strong> with ultra-bright <strong data-start="627" data-end="657">2,200 nits peak brightness</strong>, it offers exceptional clarity indoors and outdoors. With customizable watch faces and interchangeable straps, the Watch S4 lets you personalize your look with style and comfort.</p> <p data-start="838" data-end="1242">Designed for seamless connectivity, it supports <strong data-start="886" data-end="907">Bluetooth calling</strong> with <strong data-start="913" data-end="935">AI noise reduction</strong>, ensuring crisp, clear voice quality in calls. The premium rotating crown enables intuitive navigation through menus, notifications, widgets, and apps—providing the classic watch feel with modern smart technology. NFC support allows secure contactless payments, making everyday errands quick and efficient.</p> <p data-start="1244" data-end="1646">Perfect for health enthusiasts, the Watch S4 offers <strong data-start="1296" data-end="1326">advanced health monitoring</strong> including <strong data-start="1337" data-end="1485">24-hour heart rate monitoring, SpO₂ blood oxygen measurement, stress tracking, sleep analysis, breathing exercises, and menstrual cycle tracking</strong>. With <strong data-start="1492" data-end="1513">150+ sports modes</strong>, it ensures accurate tracking for workouts, movement, calories, pace, and active time—ideal for indoor and outdoor fitness routines.</p> <p data-start="1648" data-end="1992">Built for endurance, it delivers <strong data-start="1681" data-end="1714">up to 15 days of battery life</strong> on a single charge, with <strong data-start="1740" data-end="1808">quick charge support providing 2 days of usage in just 5 minutes</strong>. Featuring 5ATM water resistance, lightweight premium build, and advanced sensors, the Xiaomi Watch S4 Black edition offers a perfect balance of style, functionality, and performance.</p>