The Amazfit GTR 3 is a feature‑rich smartwatch with a classic round design and vibrant 1.39″ AMOLED display, combining long battery life with comprehensive health and fitness tracking. It offers up to about 21 days of battery life on a single charge, 24/7 heart rate, SpO2 (blood oxygen), sleep and stress monitoring, plus over 150 sports modes for activity tracking. It runs on Zepp OS, includes built‑in GPS, and supports voice assistants (Alexa + offline) for smart control and notifications from your phone. The watch is also 5 ATM water‑resistant, making it suitable for swimming.