Monitors underwater wrist-based heart rate during swim activities, this Garmin Swim 2 has 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 online community. Battery life: up to 7 days in smartwatch mode, 12 hours in GPS and optical heart rate (OHR) mode and 2.5 days in pool and OHR mode.