Immersive screen with 66% high screen-to-body ratio 1.39" HD AMOLED display Health Metrics: Heart Rate/SpO2/Stress Level/Breathing Rate Sleep Quality and Sleep Breathing Monitoring Professional Sports Data Analysis: maximum oxygen uptake (VO2 Max), full recovery time, training load and training effect Connect to popular health platforms: Apple Health, Strava, Relive, Runkeeper and TrainingPeaks Mic & Speaker Built-in/Alexa Built-in/Wifi. Test Four Health Metrics in One Tap: With the Amazfit GTR 3 smart fitness watch, you can test your heart rate, blood-oxygen saturation, stress level and breathing rate in one single tap, for a result in as little as 45 seconds. Get the data you need and then get on with your day. 21 Days Long-lasting Battery Life: The Amazfit GTR 3 activity tracker brings a kind of power and performance that’s going to stay with you for a long, long time. Even with the vast array of advanced functions assembled within its slim and light body, the GTR 3 smart watch maintain a refined elegance. Powerful Navigation Systems: The Amazfit GTR 3 smart watch has a built-in barometric altimeter to help keep an eye on the altitude and air pressure of your outdoor activities, and supports GPS, GLONASS, Galileo, BDS and QZSS satellite navigation systems to accurately track your route. Alexa Built-in and Offline Voice Assistant: Easily set an alarm, ask a question, get a translation and more with Alexa, which is built into the Amazfit GTR 3 smart watch. If you’re out and don’t have internet access, the smartwatch also has an offline voice assistant. ConnectivityZepp OS operating system. Bluetooth 5.1 connection. Wi-Fi. Display information35.3mm AMOLED screen. Touchscreen. 454 x 454 screen resolution. Battery450mAh battery capacity. Typical usage time of up to 21 days. Low usage time of up to 35 days. 1 hour charge. Physical specificationWatch size H45.8, W45.8, D10.8mm. Strap size L218, W22, . Strap can be removed and replaced. Weight 49g. FeaturesWater resistant. Swimproof. Dust resistant. Scratch resistant. Read texts and reply to texts. Read emails. Receive social network notifications. View calendar. Displays weather. Music player. Heart rate monitor. Pedometer. Distance. Accelerometer. GPS. Calories. Sleep. Accessories included: USB Charger, including charger. Manufacturer’s 2 year guarantee. EAN: 6972596103707.