Garmin Vivofit 2
Tech specs 
Size21 mm wide x 10.5 mm thick (length varies based on band size; 120-175mm (small wrist circumference) and 152-210mm (large wrist circumference)
BatteryTwo replaceable CR1632 coin cells
Battery lifeMore than 1 year
Water-resistanceUp to 50 metres (5 ATM)
Weight25.5 grams
Sensor3 axis-accelerometer
DisplayLCD (backlit display)
Screen size1.00" x 0.39" (25.5 mm x 10 mm)
ColorsBlack, White, Navy, Pink, Camo & Brown
Activity tracking 
Calories burnedYes
Heart rate
Stress & recovery
Pulse Ox
Respiration rate
UV exposure
Skin temperature
Galvanic skin response
Hydration level
Calorie intake
Running features
Swimming features
Other Goal countdown,clock, heart rate and heart rate zone (heart rate and heart rate zone available when used with an ANT heart rate monitor), beeper, activity timer
Non-fitness functions 
Smartphone notifications
On-board music storage
Connected pay
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