For better fitness, start with heart.

Let your heart be your guide with Charge HR. Monitor heart rate automatically and continuously right on your wrist to accurately track calorie burn, maintain workout intensity, maximize training and optimize health-all without an uncomfortable chest strap.

Get better tracking with every beat.

Take control of your goals by using Charge HR to record your workouts and track all-day activity like heart rate, steps, distance, calories burned, stairs climbed and active minutes. With an impressive battery life of 5+ days and instant access to every stat, you don't have to look far for motivation to keep moving

See your calls. Call the shots.

With a comfortable fit and Caller ID, Charge HR lets you stay connected in style. See incoming call notifications on display when your phone is nearby to stay in the know, on the go.

Record your workouts. Meet your goals.

Use Exercise Mode to easily record workouts, see real-time exercise stats and have summaries automatically appear on your Fitbit dashboard. Use MobileRun in the Fitbit app to see pace, distance, splits and routes.

Know your nights. Improve your days.

Get a better picture of your overall health by using Charge HR to automatically track how long and how well you sleep. Sync your nightly stats to see online graphs that illustrate your sleep trends, and wake peacefully by setting a silent, vibrating alarm.

Sync up. Stay inspired.

Charge HR automatically and wirelessly syncs your stats to your computer and 120+ leading smartphones, and tracks your progress in detailed charts and graphs that keep you encouraged to reach your fitness goals.

Features

• A seamless app experience from devices to dashboard
• View your progress and analyze your trends with easy-to-read charts and graphs
• Log workouts, see a monthly exercise calendar, & use MobileRun to track run stats and map routes
• Invite friends and family to share stats, send cheers & taunts, & compete on the leaderboard
• Log food fast with a barcode scanner, calorie estimator, meal shortcuts & expanded food database
• Get goal progress notifications & celebrate fitness milestones with badges
• Set sleep goals, review sleep quality & see weekly sleep trend graphs

Specifications

Sizing

• Large – Fits wrists 16.5–20 cm

Sensors & Components

• Optical heart rate monitor
• 3-axis accelerometer
• Altimeter
• Vibration motor

Display

• OLED Display

Heart Rate

Like all heart rate monitoring technologies, accuracy is affected by physiology, location of device, and different movements.

Water Resistance

Charge has been tested up to 1 ATM meaning it is sweat, rain and splash proof. However, the device is not swim proof. We also recommend taking Charge off before showering because, as with any wearable device, it's best for your skin if the band stays dry and clean.

Care

If the band gets wet or if you sweat in it, remove and completely dry the band before putting it back on. Clean the band with a mild soap-free cleanser like Cetaphil or Aquanil. Give your wrist a rest by taking the band off every now and then.

Materials

Charge HR's wristband is made of a flexible, durable elastomer material similar to that used in many sports watches. Charge HR also has a surgical-grade stainless steel buckle.

Battery and Power

Battery life

• lasts up to 5 days

Battery type

• Lithium-polymer

Charge time

• One to two hours

Radio transceiver

• Bluetooth low energy

Memory

• Tracks 7 days of detailed motion data – minute by minute.
• Tracks daily totals for past 30 days
• Stores heart rate data at 1 second intervals during exercise tracking and at 5 second intervals all other times

Syncing

Syncing range

• 20 feet

Syncing to computers requirements

• Internet connection and USB port

Syncing to mobile devices requirements

• Bluetooth and Internet connection

Syncs with

• Windows Vista and later, Mac OS X 10.6 and up, iPhone 4S and later, iPad 3 gen. and later, and leading Android and Windows devices