The vivomove HR has a touchscreen watch face with precision hands to indicate the time and a discreet display to show your messages, heart rate, stress level and fitness achievements. When you swipe the screen to go through your notifications, then the hands will disappear to help you focus on the stats. When you're done, then they'll reappear. Heart-rate monitoring You'll be able to check your HR throughout the day, allowing you to gauge your fitness level. This way it can more accurately track the calories you've burned and the intensity level of your workout. HR zones HR alerts HR calories HR Broadcast (broadcasts HR data over ANT+TM to paired devices) Stress tracking The vivomove HR will let you know if you're having a calm, balanced or stressed day. This will help you to determine when you need to take a break to lower your stress level. During these stress peaks you can use the installed relaxation timer to completing some deep breathing exercises. Garmin Connect Upload your fitness and wellness data to Garmin Connect, the free Garmin website where you can analyse your performance. View your detailed metrics and track your progress over time. You can also share your data with the ever-expanding online community, which may include your coach, workout buddies, friends and family. Compatible smartphones The vivomove HR is compatible with iPhone®, AndroidTM and Windows® smartphones, so you can upload data to Garmin Connect, receive smart notifications, control your music and check the weather forecast. Smart notifications: Incoming emails Text messages Call alerts Calendar reminders What's in the box? vivomove HR Charging cable Documentation Sizing: Small/Medium: measures 8.7 (221mm) in length and 4.8-7.4 (122-188mm) in circumference Large: measures 9.9 (253mm) in length and 5.8-8.5 (148-215mm) in circumference