Fitbit Charge 2

https://www.fitbit.com/charge2/charge2-101

1.5 inches OLED monochrome display, bright and easy to read outdoors.
Preloaded sport modes.
Select and auto track your preferred sport modes with SmartTrack.
Up to 7 days battery life.
Sedentary reminder to move.
Customizable watch face and interchangeable straps with 140-180 mm(small size) and 180-220 mm (large size) .
Tracks your steps, distance, sleep, stress, fitness level, heart rate and calories.
Keeps you connected to all that matters to you, so you never get to miss important updates.
Splash-proof.
Works with connected GPS to enable you track outdoor activities.
Compatible with both Android and iOS devices