Weighing in at just 42 grams, don't let the size and weight fool you! The APEX 2 packs a punch with 45 hours of standard GPS operation, 17 days of standard use, an enhanced navigation experience, next-generation optical heart rate sensor, scratch-resistant sapphire glass and grade 5 titanium alloy bezel for maximum durability. Whether you're heading out this season to crush some pavement or the trails, the small but mighty APEX 2 will be there for all your performance needs🙌 #exploreperfection