Hauwei Fit 4. Lightweight Design, Maximum Comfort. Crafted with a 9.5mm ultra-slim profile and weighing just 27g, the HUAWEI FIT 4 is designed to feel light on your wrist all day — whether you're working out, sleeping, or going about your day. Powerful Health Tracking, All in One Place. Track your heart rate, SpO2, sleep patterns, breathing quality, menstrual cycles, and more — all directly from your wrist with on-device summaries and detailed analytics in the HUAWEI Health app. Advanced Sleep & HRV Monitoring. With enhanced monitoring algorithms, get deep insights into your sleep stages, breathing patterns, and heart rate variability (HRV) for a complete picture of your recovery and wellness. Built-In Barometer for Outdoor Adventures. Conquer the outdoors with real-time altitude tracking, local elevation gains, and air pressure monitoring. Perfect for hiking, cycling, or trail running. Smarter Fitness with Enriched Modes. Choose from 100+ workout modes with auto-detection for common exercises, and benefit from dual-band GPS for accurate location data, even in challenging environments. Tap & Go with NFC Payments. Leave your wallet behind. Make secure, contactless payments right from your wrist with NFC support. All-Day Power, All-Week Performance. Enjoy up to 10 days of battery life on a single charge, with a full recharge taking only 75 minutes — always ready to move when you are. Stay Connected, Cross-Platform Compatibility. Compatible with both iOS and Android devices. Sync effortlessly via Bluetooth and access your data from the HUAWEI Health app.