Coros APEX 4 GPS Outdoor Watch 46mm The Coros APEX 4 GPS Outdoor Watch is a fully featured companion for all your outdoor adventures. Packed with features to keep you on track wherever the roads and trails may take you.  Lightweight titanium. Reinforced lugs. Sapphire glass. A Grade 5 titanium bezel and reinforced lugs provide exceptional strength without sacrificing comfort. Weighing just 51g with the nylon band, APEX 4 also features scratch-resistant sapphire glass and a 3rd-generation Memory-in-Pixel display for lasting durability in demanding alpine environments. Razor-sharp accuracy, without limits APEX 4 delivers industry-leading accuracy across GPS, pace, heart rate and elevation tracking. Combined with the ultra-long battery life COROS is known for, you can rely on precise data from start to summit and beyond. Tools for the ascent From zero-lag mapping to highly accurate performance metrics, APEX 4 equips you with the data and reliability you need for technical climbs, long traverses and everything in between-;no matter the challenge at hand. Your adventure journal The Adventure Journal captures Voice Pins, terrain photos and key moments from your effort, allowing you to review exactly what you saw, said and did. Analyse your decisions, refine your strategy and gather valuable recon to approach your next objective with greater confidence. Longer battery An always-on, 3rd-generation MIP display delivers deeper colours and higher contrast, staying clear in bright sun, snow or deep shadows. With up to 65  hours of All Systems GPS, APEX 4 is ready for multi-day missions, from the Grand Traverse to a full loop of Mont Blanc. Vertical GPS tracking Featuring COROS’ most accurate vertical GPS algorithm to date, dual-frequency tracking, a precision heart rate sensor and a dual-range barometer, APEX 4 ensures sharper elevation and weather data-;so no metres are lost when your activity is complete. Fast mapping APEX 4’s real-time mapping engine renders instantly, delivering global landscape and topographic maps with turn-by-turn navigation, trail names and points of interest, so you can stay on route and focused wherever the mountains take you. 42mm v 46mm Versions The best watch version for you, either the 42mm or 46mm, is dependent on size preference and how much battery life your training plans and race distances require. The Apex 4, 42mm, has a 1.2" display and feels smaller on the wrist, while the larger 46mm version has a 1.3" display and longer battery life.  Battery: 42mm - 41 hours GPS run time; 46mm - 65 hours GPS run time Display Size: 42mm - 1.2"; 46mm - 1.3" Weight (silicone band): 42mm - 56g; 46mm - 64g