Unisex adjustable band Continuous heart rate monitor, optional on/off App Alerts (Facebook, Gmail, Twitter, Amazon, and more!) Up to 1-week battery life between charges, up to 1 month without heart rate feature on Habit journaling (diet, weight, medication, hydration) Activity monitor (steps, distance, calories, walk time) Sleep monitor Caller ID etc Meeting reminders Smartphone music control Touchscreen Splash- and sweat proof Micro-USB powered Compatible with Apple iOS 8.1+ and Android 4.4+