Battery lasts up to 5 days in smartwatch mode. Receive smart notifications. Garmin Pay. Built-in Incident Detection. Chronograph timer and stopwatch. Garmin Connect app. Body Battery Energy Monitoring. Wrist-based Heart Rate. Sleep Score and Sleep Monitoring. Pulse Ox sensor. Uses phone's GPS for accurate tracking. Fitness Age - estimate body's age. Preloaded sports apps. Silver stainless steel bezel. Mist gray case and silicone strap. Case size: 40.4 x 40.4 x 11.9mm. Strap fits wrists 125-190mm in circumference.