【Built-in Bluetooth and Alexa Calls】The smart watch includes a microphone and speaker to let you answer calls on the watch when it's inconvenient to lift your mobile phone and set alarms and timers, check the time, control your smart home devices, create shopping lists, ask questions, get translations and more, raise your wrist and ask Alexa. BODY COMPOSITION MEASUREMENT: Monitor your body fat, skeletal muscle, muscle, water, bone mass, protein, BMI, and basal metabolism to track changes in your body composition. Should not be used by pregnant women, people with implantable pacemakers, defibrillators or other implanted medical apparatus. ULTRA-LONG BATTERY LIFE: With typical use, expect a long 14-day battery life, or up to 25 days in Use time saver mode. You'll easily go weeks without having to worry about stopping to charge. 200+ WATCH FACES: Quickly change the appearance of your watch face to match your outfit, workout, or mood, or add your own custom photo background. 【LISTEN TO YOUR MUSIC & RECEIVE BLUETOOTH CALLS】When you’re out for a walk, working out, or seeing friends, you can leave your phone in your pocket. Through Bluetooth connection to your phone, the Amazfit GTR 3 Pro smart watch can receive phone calls, and also be used to easily control the music on your phone. You can even store upto 470 songs on the watch for independent music playback.