Improve and stretch your fitness goals with the continuous tracking and monitoring of the Timex Ironman R300 GPS smartwatch. It guides you through your training sessions with robust battery power. Continuous 24/7 activity tracking with a range of improved performance metrics including steps, distance, speed and calories burned Continuous heart rate monitoring even as you sleep establishes your true resting heart rate with improved metrics and customizable vibrating alarm Sedentary reminder and movement alert motivates you to be active to achieve your fitness goals Hydration and nutrition alerts for when you need to replenish the calories burned Guided coaching lets you follow training plans developed by top athletes for running, cycling and triathlons Onboard and quick-fix GPS connection means you only need your watch to track your distance and pace Syncs to your smartphone for text and social notifications, phone finding and data transfers with Bluetooth wireless connectivity Battery stays powered between charges for up to 25 days in smartwatch mode and 20 hours with GPS to stay connected in the wild Durable, lightweight workout-ready case is water-resistant to 50 m (5 ATM), allowing you to swim and sweat without worry Easy-to-use menus with TapScreen technology and sunlight-readable display features customizable watch faces for a personalized look Soft silicone rubber straps hold securely on your wrist against the skin