XIAOMI Watch S4 41mm, Smartwatch, 41mm case diameter, Ultra lightweight 32g body, Menstrual cycle prediction, 150+ sports modes, Safety guardian features, HyperOS 3, Fluororubber Strap(Black)

【Design】Premium stainless steel body with multifaceted-cut crown and minimalist lugs inspired by classic wristwatch aesthetics. 41mm compact case, ultra-lightweight 32g, 9.5mm slim profile. 【Health Monitoring】0.1°C high-precision temperature sensor monitors skin temperature 24/7, leveraging temperature patterns to predict menstrual cycles. 【One-Tap Health Check】Heart rate, blood oxygen, stress, and sleep assessed in one tap for a quick health status overview. 【Safety Features】Triple-click crown to auto-call emergency contacts and share location. 3-second long press activates Safety Mode with real-time tracking or siren. 【Ecosystem】XIAOMI HyperOS 3 with Focus Notifications delivers prioritised alerts from system apps and Mi Home for a smarter wrist experience.