Operating system Zepp OS 4.0 Memory storage capacity 26 GB Special features Maps, Altitude Assistant, Compass, dual-band GPS, Freediving Certified Connectivity technology Bluetooth, Wi-Fi Wireless communication standard Bluetooth About this item Large, Bright Display: The AMOLED display can reach peak brightness of 2,000 nits; read your maps and workout data easily in any light. Night mode reduces eye strain in the dark, and Glove Mode keeps the screen responsive when wearing 2mm thick gloves. Built for Adventure: Endure any challenge with a 316L stainless steel bezel and buttons. The military-grade body can resist 158°F heat and -22°F cold. Water-resistant to 328 Feet, the watch is great for surfing and can be used for freediving to a depth of 147 Feet. Over 3 Weeks of Battery Life: The Amazfit T-Rex 3 smart watch can last for 27 days with typical use, 42 hours in GPS Accurate Mode, and up to 114 hours in GPS Long Battery Life Mode. With some settings disabled, GPS usage can even last up to 180 hours for long hikes. Free Maps & Advanced GPS: Download free global, contour, and snow maps. Track your adventures accurately with dual-band positioning, backed up by 6 satellite systems for fast connection. Get turn directions from your smartwatch as you go. 170+ Workout Modes & AI Training Plans: Explore 170+ workout modes including hiking, strength training, ultramarathon, surfing, skiing, and more. Get personalized AI-generated training plans, real-time performance updates, and more. Take Charge with AI: Fully control your smart watch with your voice thanks to Zepp Flow powered by OpenAI's GPT-4o technology, and send speech-to-text message replies to Android apps like WhatsApp. Enhanced Privacy Protection: Amazfit T-Rex 3 smartwatch offers top-tier data protection from Amazon Web Services, ensuring GDPR compliance. Take full control of your privacy by choosing to enable or disable GPS data storage.