Skip to content

LifeTrak Zone R420

Sold out
Inventory: Loading..

Health tracking from A to Zzzz

Fitness is more than calories in and calories out. Our LifeTrak Zone R420 unites all the tools you need to enhance your wellbeing. Maximize your results with activity and sleep monitoring, workout mode, accurate step counts and distance calculation, and at-a-glance weekly and hourly records. With heart rate monitoring available continuously via a chest strap and Bluetooth or with a simple push of a button, you can be sure you are always in the Zone. Sync to our LifeTrak app for detailed data or view reports right on your tracker. Combined with a long-lasting battery that never needs recharging, the Zone R420 is ready to go whenever you are. And with reversible/interchangeable bands, you can take control of your health in style


  • Continuous Heart Rate via chest belt (belt sold separately)

    Don’t overtrain; don’t undertrain. Stay in the zone whether you’re working out or catching up on sleep.
    • Stream and record heart rate readings with a Bluetooth chest strap.
    • Receive data right on your LifeTrak Zone R420 activity tracker.
    • Workout without your mobile device and transfer data later for maximum convenience.
  • ECG Accurate Heart Rate finger touch via push button

    No chest strap? No worries. Keep your intensity in the right zone at the touch of a button.

    • Check your heart rate with a simple touch of a button.

    • View your ECG wave reference and percent of max heart rate right on your display.

    • Store multiple measurements for deeper insight and a long-term view of your progress.

  • Heart Rate Zone Analysis via LifeTrak app

    Think long-term and turn data into results with app connectivity.

    • Record continuous heart rate readings via your Bluetooth chest strap (sold separately).

    • Review your heart rate zone in the LifeTrak app after your workout.

  • App Compatability*

    Think long term. View detailed charts. Review more than a year of data.

    • Store all your data, get deeper insight and view long term trends using the LifeTrak app.

    • Transfer data from the Zone R420 to your compatible Smartphone and tablets with a push of a button.

    • Compatible with LifeTrak, Apple Health and Google Fit apps

  • Automatic Sleep Tracking

    Rest easy. Automatic sleep and wake detection. Monitors sleep quality.

    • Rest easy without needing to tell the Zone R420 you’re going to sleep or waking up.

    • Review your sleep quality data to help you improve your night’s rest.

    • Zone R420 monitors your sleep quality and quantity.

  • Precise Activity Tracking

    Know your numbers. Automatically tracks all day calorie burn, steps, distance and workouts. Stores data up to seven days on wrist.

    • Step Count & Distance Calculation

      • Get a better picture of your progress with accurate step count and distance measurement.

      • Uses a 50-60 step buffer to filter out false steps by making sure you are really walking, before updating the count.

      • Adjusts to walking, jogging, or running through a patented pace-based algorithm.

  • Track Calories Burned

    Get all day calorie burn stats for a more accurate picture of your progress. Automatically calculates calorie burn using heart rate readings and daily activity.

  • No Recharging Needed

    Wear it anytime and anywhere without recharging. No Charging; typical one-year battery life with standard coin cell.

  • 30M Water Resistant

    Water resistant to 30 meters (90 feet).

  • Reversible & Interchangeable ComfortFit Band

    Personalize to your style. Reversible/interchangeable bands and additional colors available.

Customer Reviews

3.3 Based on 3 Reviews
5 ★
4 ★
3 ★
2 ★
1 ★
Write a Review

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Walk-in S.

Love the watch..bought another R450..and

Love the watch..bought another R450..and love it too. Sad that u no longer have have LifeTrak...

Samuel E.

Tough but not scratchproof

Bought this Lifetrak R420 after my initial introduction to the brand from the C series. What i love about it: great battery life. So far nearly 2 years later, i have changed battery only twice, by myself. It's reasonably waterproof, provided you put the o-ring back properly. What could be better: as many reviewers have pointed out, the HR function doesn't work very well when you are in the middle of exercise. It is quite accurate for the resting HR. Scratches quite easily.

Joseph P.