Rugged GPS smartwatch is water-rated to 100 meters and thermal- and shock resistant with fiber-reinforced polymer case and scratch-resistant Corning Gorilla glass Battery life: up to 28 days in smartwatch mode; up to 30 hours in GPS mode Live the ultimate connected life with smart notifications and Connect IQ compatibility when paired with your compatible smartphone. Track your adventures with the built-in 3-axis compass and barometric altimeter, plus multiple global navigation satellite systems (GPS, GLONASS and Galileo) Understand your body better with all-day health monitoring features that track your heart rate, sleep, Pulse Ox, respiration and more (Pulse Ox not available in all countries. This device is intended to give an estimation of your activity and metrics; it is not a medical device) Built-in sports apps to take on running, biking, swimming, strength training and more; plus, VO2 Max and other training features This pre-owned or refurbished product has been professionally inspected and tested to work and look like new. How a product becomes part of Amazon Renewed, your destination for pre-owned, refurbished products: A customer buys a new product and returns it or trades it in for a newer or different model. That product is inspected and tested to work and look like new by Amazon-qualified suppliers. Then, the product is sold as an Amazon Renewed product on Amazon. If not satisfied with the purchase, renewed products are eligible for replacement or refund under the Amazon Renewed Guarantee.