Key Specifications of the Amazfit GTR 4 Mini:

• Dimensions: 42.83 x 42.83 x 9.25 mm

• Weight: 24.6g (without strap); 36.2g (with strap)

• Build: Stainless steel frame with a plastic back and one physical button

• Strap: 20mm quick-release silicone

• Water Resistance: 5 ATM (up to 50 meters)

• Display: 1.28-inch AMOLED, 416 x 416 resolution (326 PPI)

• Glass: 2.5D tempered glass with an anti-fingerprint coating

• Battery: 280mAh capacity

• Battery Life: Typical use: 14 days; Heavy use: 7 days; Battery saver: 20 days; Continuous GPS: 25 hours

• Positioning: Circularly-polarized antenna supporting 5 satellite systems (GPS, GLONASS, Galileo, BeiDou, QZSS)

• Health Sensors: BioTracker PPG biometric sensor for 24/7 heart rate, SpO2, and stress monitoring

• Activity Sensors: Acceleration sensor, geomagnetic sensor, and ambient light sensor

• Connectivity: Bluetooth 5.2

• OS: Zepp OS 2.0

• Fitness Modes: 120+ sports modes with smart recognition for 7 movements

• Compatibility: Android 7.0+ or iOS 12.0+ via the Zepp App