GARMIN Forerunner 255 Mystic Gray Heart Rate Running Triathlon Outdoor Sports Smartwatch Birthday Gift

Barometric Altimeter

Pulse Ox (Blood Oxygen Saturation)

GPS with multi-frequency and multi-constellation support

Bluetooth pairing with Garmin Connect App for smartphone integration

NFC for contactless payments and transit card support in over 300 cities nationwide (supports WeChat and Alipay offline payments)

Supports over 30 indoor and outdoor sports modes including running, cycling, swimming (pool and open water), triathlon, trail running, paddle sports, strength training, yoga, HIIT, and more

Triathlon mode with one-button sport switching and continuous data recording

Running power measurement (with compatible sensors)

VO2 max estimation and training effect analysis

Training load and training status monitoring

HRV (Heart Rate Variability) status for stress and recovery insights

Sleep monitoring with sleep score and HRV analysis

Heat and altitude acclimation tracking

Race predictor and race assistant features

Real-time stamina and training readiness metrics

Touchscreen available on select models

Customizable watch faces and widgets

GPS tracking with route recording and mapping

Weather and temperature display

Smart notifications and alerts

Currently incompatible with Huawei HarmonyOS and Xiaomi SurgeOS systems

NFC transit card balance over 100 RMB may not support refund; users advised to reduce balance below 100 RMB before refund application

Power on watch by pressing the top-left button

Select language with top-right button

Pair with smartphone via Garmin Connect App

Access settings by long pressing middle-left button, then short press middle-left to display settings page

Enter system settings via top-right button

Access About page by short pressing middle-left button

Serial number displayed after pressing top-right button

Battery life and performance data are based on laboratory tests; actual results may vary depending on usage and conditions.