Features: Lens Material: Power Glass Bezel Material: Fibre-Reinforced Polymer Case Material: Fibre-Reinforced Polymer Strap Material: Silicone Display Size: Custom, Two-Window Design; 0.9??X 0.9??(23 X 23 Mm) Display Resolution: 128 X 128 Pixels Memory/History: 16 MB Clock Features: Time/Date, GPS Time Sync, Automatic Daylight Saving Time, Alarm Clock, Timer, Stopwatch, Health Monitoring: Daily Resting Heart Rate, Abnormal Heart Rate Alerts, All-Day Stress Tracking, Sleep, Hydration, Menstrual Cycle Sensors: GPS, Glonass, Barometric Altimeter, Compass, Accelerometer, Thermometer Daily Smart Features: Smart Notifications, Calendar, Weather, Controls Smartphone Music, Find My Phone, Find My Watch Activity Tracking Features: Calories Burned, Floors Climbed, Distance Travelled, Intensity Minutes Fitness Equipment/Gym: Available Gym Activity Profiles - Indoor Rowing, Strength Training And Cardio Training, Cardio Workouts, Strength Workouts, Automatic Rep Counting Training, Planning And Analysis Features TIDE DATA: Simply By Looking At Your Wrist, Stay Up To Date On Ocean Conditions To Help Catch The Perfect Wave. SURF ACTIVITY: Record The Number Of Waves Surfed, Maximum Speed Reached And Distance Traveled By Using The Surf Activity Profile. POWER MANAGER: View How Various Settings And Sensors Impact Your Watch?? Battery Life, So You Can Make Battery-Extending Changes On The Fly. Running Features Golfing Features Outdoor Recreation Cycling Features Swimming Features Water Resistance: 100M Approximate Size: 45 x 45 x 15.3 mm