The Garmin Active 4S Smartwatch tunes to your body and the 40 MM vívoactive 4S GPS Smartwatch boosts sound. It features the widest range of 24/7 sleep monitoring features, music storage and on-screen animated workouts to help you reach your goals. Connect directly to your watch by downloading your favorite Spotify or Deezer playlists (premium music subscription may be required). Product features: *Extensive day-to-day* monitoring features to track your energy level, Pulse Ox*, shopping cycle, stress, sleep, heart rate**, easy download of songs to indoor watch, including free playlist ) features include Incident Detection (during select missions) and Assistance (when paired with a compatible device) Send real-time location to emergency contacts (when paired with a compatible device) Stay connected to receive calls, text messages, calendar reminders, and more Reminders and more, Garmin Coach offers free 5K, 10K and half marathon training plans to guide you to your race goals and adjust based on your performance in the monitor