* GPS swimming smartwatch for the pool and open water * Monitors underwater estimated wrist-based heart rate during swim activities* Pool swim mode: records distance, pace, stroke count, stroke type and swolf (gauges swimming efficiency)* Open-water swim mode: uses built-in GPS for swims in lakes, oceans or rivers; records distance, pace, stroke count, swolf, stroke rate and stroke distance* Offers advanced features for staying on pace, logging drills and more* Includes free online analysis, custom workout creation, storage and sharing on Garmin Connect* Connected features when paired with a compatible smartphone include smart notifications and automatic uploads to our Garmin Connect* Battery: up to 7 days in smartwatch mode, 13 hours in GPS and optical heart rate (OHR) mode and 72 hours in pool and OHR mode