This Amazfit T-Rex 3 can really go the distance. In normal use, it lasts 27 days. In GPS mode - up to 180 hours. It's insanely durable, passing military-grade tests and resistant to shock, heat, cold, and humidity. It tracks heart rate, V02 max, and performance metrics, with a dedicated Hyrox mode. You can record over 170 activities, monitor progress with distance and speed, and it's 100m swimproof. The T-Rex 3 monitors altitude changes and prompts blood oxygen checks for safety at high altitudes. The 1.5" AMOLED display is bright and readable in sunlight. Dual-band GPS with free offline maps aids tracking and navigation. Zepp Coach builds personalized plans, and Zepp Flow, powered by GPT-4, allows voice commands for hands-free operation. This smartwatch is ideal for monitoring a healthy lifestyle, functioning as a personal assistant, coach, and elegant companion. It features Bluetooth, GPS, a gyroscope, altimeter, waterproof design, a colored display, a long-lasting battery, and collects/analyzes data during physical activity via a mobile application. Its stainless steel bezel ensures durability and it's compatible with iOS and Android systems.