Xiaomi Redmi Watch 4 Black

🔹 1.97″ AMOLED display, 390×450 resolution, 60 Hz refresh rate, up to 600 nits brightness
🔹 Aluminum alloy frame, replaceable strap, 5 ATM water resistance
🔹 Bluetooth 5.3 with call support when connected to smartphone
🔹 Multi-system GNSS: GPS, Galileo, GLONASS, BeiDou, QZSS
🔹 BioTracker™ PPG sensor: heart rate, sleep, SpO₂, and stress monitoring
🔹 Up to 20 days battery life, 10 days with heavy use
🔹 150+ workout modes, automatic activity detection
🔹 Runs on HyperOS, with customizable watch faces and widgets
🔹 Compared to Redmi Watch 3: larger screen, better battery, premium design