Garmin Swim 2 is the ultimate Smartwatch for the swimmer. The watch is designed to monitor heart rate and record distance, pace, number of swim roofs, swimming efficiency (SWOLF) and more, in both pool and open water. See your heart rate on your wrist without using a heart rate monitor. Check your heart rate directly on your wrist as you swim and rest, then analyze your swim in Garmin's Connect app Get pace alerts, log exercises and everything you need to promote your swimming. Turn-based pace alarms make it easy to train efficiently and reach your goals. Know when to speed up or down with Critical Swim Speed Plan your workout and follow your progress when you know your crucial swim speed, which is like your anaerobic limit speed. The clock stops automatically when you stop your swimming. When you need a break, the Swim 2 watch allows you to register your breaks with two types of timers. Organize your training exactly as you want. Battery life for seven days a week Internally rechargeable battery provides up to seven days in smartwatch mode, 13 hours in GPS and Optical Heart Rate (OHR) mode, and 72 hours in pool and OHR swimming mode. Stay up to date with notifications. Receive emails, texts, and notifications right on the watch when paired with a compatible smartphone. Swim 2 comes with silicone straps in the selected color and chemically tempered glass as well as color display. The watch case measures 42x42x11.4 cm and fits, following Garmin's recommendation for wrists of 129-197mm in circumference. The watch weighs 36gr. The watch's built-in memory counts 50 hours of activity data. When pairing with a smartphone, data is automatically transferred to the Garmin Connect app. Note this is not a diving watch and does not support scuba diving!