Xiaomi Watch S4 41mm with Fluorinated Rubber Strap Mint Green

This watch, with its steel bezel and a 1.32" AMOLED screen capable of 2,200 nits, is compact and light, suiting smaller wrists while still delivering top-tier performance. At only 32g, it is 5 ATM water-resistant and, with a 320 mAh battery and HyperOS 2, provides up to eight days of normal usage.

Made for slender wrists

The 41.2 mm case, 9.5 mm thick, comes with a soft, hypoallergenic Mint Green fluoroelastomer strap that keeps its shape even when sweaty. The 2.5D curved glass and polished edge give it a sleek appearance and make cleaning straightforward.

Luminous always-on screen

The AMOLED panel delivers 466 × 466 px (≈320 ppi), a 60 Hz refresh rate and 2 200 nits peak brightness, so it remains fully legible in bright sunlight. Always-On mode is dynamically controlled to keep power use to a minimum.

A week of battery life

Usage time reaches up to 8 days in mixed conditions (24 h monitoring, notifications and GPS on time) or 20 h continuously with GPS active. The two-pin magnetic base brings it back to 100% in 75 min.

Sophisticated health and sport

• Multi-channel sensors: PPG for heart rate and SpO₂, accelerometer, gyroscope, compass, barometer and skin thermometer.
• 150+ sport modes and dual GNSS (GPS, GLONASS, Galileo, BDS, QZSS) for accurate metrics.
• Irregular heart rate alerts and stress assessment with guided breathing.

Connectivity and smart functions

Bluetooth 5.4 allows hands-free calling and music control; works with Android 8.0/iOS 14 or higher. It has no NFC, but includes a dual microphone and speakerphone for voice assistants.

Our expert view

The Xiaomi Watch S4 41mm addresses the usual problem of small wrists without giving up brightness or sensors compared with the 46mm model. Against rivals like the Galaxy Watch 6 40 mm or the Apple Watch SE 2 40 mm, it shines for its ultra-light weight and greater brightness, though it falls behind on mobile payments because it omits NFC. Next to the Watch S3, it offers a brighter panel and better power management. The balance between performance and autonomy, together with the brand's typically low price, makes it a very well-rounded choice for anyone after a compact smartwatch without sacrificing thorough sports metrics.

Technical Specifications Xiaomi Watch S4 41 mm (Mint Green, Fluorinated Rubber Strap) General Model Xiaomi Watch S4 - 41 mm version Dimensions 41.2 mm × 41.2 mm × 9.5 mm Weight ≈ 32 g (without strap) Available colours Mint green (this tab), white, black, sand gold Display Type and size AMOLED 1,32″ Resolution 466 × 466 px (~320 ppi) Refresh rate 60 Hz Brightness High Brightness Mode 1500 nits (HBM) Always-On Display Yes (depending on dial) Design and materials Strap included Fluorinated rubber (FKM) - Mint Green Dial/bezel Interchangeable bezel; official kits available Water Resistance 5 ATM Health & Sport Monitoring 24/7 heart rate, SpO₂, stress, sleep (advanced) Sport modes 150+ modes; trainer and wrist-based running courses Pro features Running technique recognition, guided breathing Positioning GNSS L1+L5 dual-band chip with multi-constellation support Connectivity and payments Bluetooth 5.3 NFC Contactless payments (Mastercard/Visa) - availability by region Calling BT calls from the phone (third party apps not supported) System and apps System Xiaomi HyperOS 2 for wearables Compatibility Android 8.0+ / iOS 14.0+ (via Mi Fitness app) Integrations Health Connect, Strava and Suunto (syncing and sharing) Battery and charging Battery life Up to ~8 days (typical use on 41mm version) Charging 2-pin magnetic dock Audio and sensors Audio Built-in microphone and speaker Sensors Accelerometer, gyroscope, compass, barometer, HR/SpO₂; skin temperature sensor depending on market Box Contents. 1 × Xiaomi Watch S4 41 mm (bezel + FKM strap)
1 × Magnetic charging dock (2 pins)
1 × User guide and warranty