Bold, rugged GPS smartwatch is built to U.S. military standard 810 for thermal, shock and water resistance — with a large solar-charged display and durable 50 mm polymer case Solar charging: Power Glass lens extends battery life, producing 50% more energy than the standard Instinct 2 solar watch Infinite battery life in smartwatch mode when exposed to 3 hours of direct sunlight (50,000 lux) per day Dedicated tactical features include jumpmaster activity, waypoint projection, dual-position GPS format and preloaded tactical activity Unlock the Applied Ballistics ballistics calculator via the AB Synapse – Garmin app (unlock fee required) to access aiming solutions for long-range shooting in the field Go dark with stealth mode to disable wireless communication and data sharing Built-in LED flashlight with variable intensities and strobe modes gives you greater visibility while you train at night and provides a bright, steady beam in either green or white light 24/7 health and wellness tracking helps you stay on top of your body metrics with wrist-based heart rate, advanced sleep monitoring, respiration tracking, Pulse Ox and more (this is not a medical device, and data presented is intended to be a close estimation of metrics tracked. Pulse Ox not available in all countries.) Built-in sports apps to take on running, biking, swimming, strength training and more, plus VO2 max and other training features Multi-band GNSS technology delivers more accurate positioning than single band devices