Highlights :

• [GPS + GLONASS dual-satellite] Positioning chip for increased speed and accuracy.
• [All-round Health Tracking] Equipped with the Huami-developed BioTracker 2, the second-generation PPG bio-tracking optical sensor, the Amazfit GTS 2 can provide 24-hour heart rate monitoring, blood-oxygen saturation measurement, sleep quality monitoring and stress level monitoring. Also included is the PAI health assessment system, which uses algorithms to convert all of your complex health and activity data into one single score, helping you understand your physical state at a glance.
• [3GB Music Storage] Control mobile music playback through the watch via Bluetooth, and transfer your favorite songs to the watch through your mobile phone with a massive 3GB of local music storage. Put your wireless headphones in, your phone down, and workout to the rhythm of the music anytime, anywhere.