Amazfit GTR 3 GPS Smart watch 1.39" Zepp OS App-support 21-day Battery Life for Android IOS

150+ Sport Modes & Powerful Navigation Systems: GTR 3 Smartwatch Men's Virtual Pacemaker Mode could help you get better by giving you a target to beat. Built-in Alexa and offline voice assistant: Easily set an alarm, ask a question, get a translation and more with Alexa. 21 Days Battery Life and AMOLED Always-on Display with 100+ Faces: Despite the multitude of advanced features in its slim and light body, the Amazfit Sport Watch works up to 21 days. With the Amazfit GTR 3 smart watch, you can test your heart rate, blood oxygen saturation, stress level and respiratory rate with a single tap for a result in just 45 seconds..syi