Xiaomi S4 Smart Watch - Black

Overview

The Xiaomi Watch S4 is a premium smartwatch designed for fitness tracking, health monitoring, and smart connectivity features. It combines a stylish design with advanced sensors and long battery life.

Design & Dimensions

• Size: 47.3 × 47.3 × 12.0 mm (without strap)
• Weight: approx. 44.5 g (without strap)
• Frame: Aluminum alloy
• Stylish interchangeable bezel design

Display

• Size: 1.43-inch AMOLED
• Resolution: 466 × 466 pixels
• Refresh Rate: 60Hz
• Brightness: up to 1500 nits (HBM)
• Sharp and bright display for outdoor visibility

Performance & Software

• Operating System: Xiaomi HyperOS 2
• Seamless smartwatch UI with smart hub integration
• Supports notifications, calls, and smart controls

Sensors

• Heart rate sensor (with SpO2 blood oxygen monitoring)
• Accelerometer
• Gyroscope
• Ambient light sensor
• Electronic compass
• Barometer sensor
• Hall sensor

Fitness & Health Features

• Heart rate monitoring (24/7)
• Blood oxygen (SpO2) tracking
• Sleep tracking
• Stress monitoring
• 150+ sports modes
• Built-in GNSS (GPS, GLONASS, Galileo, BeiDou, QZSS)

Battery

• Capacity: 486 mAh
• Battery life: up to 15 days (typical use)
• Magnetic charging dock

Connectivity

• Bluetooth 5.3
• NFC support (region dependent)
• Bluetooth calling support

Water Resistance

• 5ATM (up to 50 meters)
• Suitable for swimming and shallow water activities

Key Features

• Large 1.43" AMOLED bright display
• Advanced health tracking sensors
• 150+ sports modes
• Built-in GPS positioning system
• Long battery life up to 15 days