Fitbit Charge 3
Tech specs 
SizeDevice Dimensions: 18.3 mm x 11.8 mm x 38 mm (W x D x L)
One size (small and large bands included)
MaterialBuilt of more lightweight material including an aerospace grade aluminum case and Corning Gorilla Glass 3 display. The housing and buckle are made of anodized aluminum.
Battery lifeup to 7 days
Water-resistance5 ATM
Weight29 grams
SensorOptical heart rate tracker, 3-axis accelerometer, altimeter, SpO2, vibration motor
DisplayOLED full touchscreen, TFT
Screen size38 x 18.3mm
OtherNFC (Special edition)
Connectivity: Bluetooth, WiFi
Charge 3 stores your stats and data for 7 days in between the times you sync your tracker.
Activity tracking 
Calories burnedYes
Heart rate24/7
Stress & recovery
UV exposure
Skin temperature
Galvanic skin response
Hydration level
Calorie intake
GPSConnected GPS
Running features
Swimming features
Other Guided breathing, Female Health Tracking
Non-fitness functions 
Smartphone notificationsYes
On-board music storage
Connected payYes (special edition)
Affiliate link*Amazon | Fitbit
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