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Fitbit Charge HR General Info &
Specifications
Sensors and motors
Your Fitbit Charge HR uses a MEMS 3-axis accelerometer to measure your motion
patterns and determine your steps taken, distance traveled, calories burned, and
sleep quality. Fitbit Charge HR also contains:
• An altimeter, which measures floors climbed
• A vibration motor, which allows it to vibrate when alarms go off, when you
reach a goal, and when you receive call notifications
• An optical heart rate tracker, which measures your beats per minute (BPM) at
rest and when you are exercising
Battery
Fitbit Charge HR contains a rechargeable lithium-polymer battery.
Memory
Fitbit Charge HR holds detailed minute-by-minute information for the most recent 7
days and 30 days of daily summaries. Heart rate data is stored at one-second
intervals when in exercise mode and at five-second intervals at all other times.
Your recorded data consists of steps taken, distance traveled, calories burned, floors
climbed, active minutes, heart rate, and sleep tracked.
Sync your Fitbit Charge HR regularly to have the most detailed data available to view
on your fitbit.com dashboard.
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