Mio Global | Mio SLICE Heart Rate Activity Tracker
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The first activity tracker to feature PAI: a personal score for staying healthy


Get real-time heart rate intensity feedback with a personal score.


Best in class, most accurate heart rate tracking, 24/7.


Tracks steps / distance / calories burned.


Up to 30m / 100ft.


Automatically monitors sleep quality.


Receive phone call and text message alerts.




Capture the intensity of every activity with Mio SLICE, the first activity tracker to feature PAI. Watch this video to see how PAI works.

Know where you stand, spin, or sprint

One glance at your PAI score instantly tells you if you’ve been active enough to stay healthy.

Mio SLICE Heart Rate + Activity Tracker
Mio SLICE Heart Rate + Activity Tracker

Mio SLICE is the first wearable that provides a PAI score - the most meaningful way to track all your activity, motivating you to stay healthy.



Small fits wrists 5.5” to 6.75” / 13.97 cm to 17.15 cm in circumference

Large fits wrists 6.75” to 8.25” / 17.15 cm to 20.96 cm in circumference

$129.00 USD
Coming Soon in February 2017!

We offer FREE standard shipping throughout the United States, Canada, Australia, New Zealand and some countries in Europe. More information

All Mio Performance Wearables come with a limited 1-year Warranty. More information

If you are not fully satisfied with your purchase from www.mioglobal.com, simply return your product in the original, undamaged packaging to us within 60 days of purchase for a full refund. Please contact support@mioglobal.com for more information.

  • Requires the Mio PAI application for configuration. Free download in the App Store and Google Play Store.
iOS 9.0 and above
  • iPhone 7, 7Plus, 6s, 6s Plus, 6, 6 Plus, SE and 5S
Android 5.0 and above
  • Google Nexus 5, 5x, 6, 6p
  • Samsung Galaxy S5, S6, S7, Note 5

  • PAI, heart rate, resting heart rate, sleep, calories burned, steps, distance, and time.
  • TPU strap, anodized aluminum main body and buckle
  • OLED
Battery Type:
  • Rechargeable li-poly battery with USB charger
Battery Life:
  • Up to 5 days (depending on usage and settings)
Water Resistant:
  • 30m/100 feet (3 ATM)
Sensors & Components:
  • Optical heart rate tracker
  • 3-axis accelerometer
  • Vibration motor
  • Bluetooth Low Energy 4.0+ (select devices)
  • ANT+
  • Saves 7 days of activity data.
  • Stores heart rate data at 1 second intervals during exercise, every 5 minutes below moderate activity, and every 15 minutes during sleep.

  • Small fits wrists 5.5” to 6.75” / 13.97 cm to 17.15 cm in circumference
  • Large fits wrists 6.75” to 8.25” / 17.15 cm to 20.96 cm in circumference
Small Dimensions: (H x W x L)
  • 0.53” x 0.82” x 8.46”
  • 1.35 cm x 2.08 cm x 21.5 cm
Large Dimensions: (H x W x L)
  • 0.53” x 0.82” x 9.45”
  • 1.35 cm x 2.08 cm x 24 cm
  • Small: 0.99 ounces / 28 g
  • Large: 1.02 ounces / 29 g

Mio SLICE Heart Rate + Activity Tracker is rated 4.4 out of 5 by 57.
Rated 5 out of 5 by from Good product - great customer service! I bought the Mio Slice at Brookstone after reading the tech wrap up from the Consumer Electronics Show. I was impressed by the heart rate function and loved the PAI app. It was great to stop counting steps and have a metric that was more meaningful for over physical fitness and for me, heart health. I did have a challenge when updating the firmware which caused the slice to stop working. After a few email exchanges with the Mio customer service team, they sent me a replacement unit. Now I am back up an running and showing off my slice. This is a good product with a team that is constantly thinking how it can become even better. Highly recommend!
Date published: 2017-02-26
Rated 4 out of 5 by from Back on my Wrist I have seen major improvements in the Firmware over the last month or so. I felt like it was a beta product and we were the testers in the beginning. Optical HR is night and day compared to where it was when I first tried it. I get a better HR reading with Slice than I do with the other Top Names trackers. I haven't tried HIIT type workouts, on my list for next week. At least for weight training it took about 15 seconds for it to catch up. Other Trackers took longer. It is also very comfortable. Feature request: Alarm and Exercise Calorie burn.
Date published: 2017-02-10
Rated 4 out of 5 by from Almost perfect I've had my SLICE for about two weeks now and really like it. The PAI technology is helping me improve my workouts/activity level, I love that it tracks "non-step" activities, and I've got compliments on the look of it. My only real complaint is that the battery life is so poor. Even though the product spec advertises up to 5 days battery life (depending on settings), I didn't have realistic expectations of 5 days. However, even with notifications turned off, all screen settings at the lowest possible and ANT+ turned off, a charge only lasts 36-48h. For reference, I'm no pro athlete; that's only logging one workout (~1h) about 5 times a week.
Date published: 2017-06-01
Rated 5 out of 5 by from Great Heart rate watch! I brought the watch from mio website and I love it! Love the style of the watch. I really like that I get alerts on my watch for text messages or phone calls. It keeps track of my sleep and I know how many hours I got my REM sleep. I like that it doe PAI score so I know my overall heartrate for every workout I did, not just my steps. Overall, a great watch!
Date published: 2017-03-03
Rated 4 out of 5 by from Getting Better... Bought this from Brookstone after following this device since 2016. Heart rate tracking is one of the best out there and the simplicity and form factor are its strengths. Like others here have said, feels a bit like we are beta testers. The updates are making it better each time like with sleep tracking issues, but even with the most recent updates here are areas that need improvement in order of importance (to me):1. Saved activities need to show calories burned, right now only shows duration of activity and PAI earned from activity. I understand this update will be released in two months but it needs to happen sooner.2. Activity auto-start/stop needs improvement. Right now an activity might start on its own while I'm sitting on the couch but end/save an activity while I'm still mid-stride in the middle of a run. There have been times where I started an activity manually for an intense workout and I don't look at my wrist for a while only to notice the activity has already been stopped and saved. At the very least, add a vibration alert when an activity starts and stops so I don't lose 10 minutes on a logged activity.3. PAI score still doesn't match between the Slice and the app. I have no idea which one is my real PAI score. If this is the selling point of the Slice, it should be working flawlessly.Nice to haves:-Alarm/date (future update I think)-MyFitnessPal connectivity/compatibility-Improved displays/charts/graphs on the app to better monitor trends to include sleep-tracking, steps, calories burned, etc.
Date published: 2017-02-15
Rated 5 out of 5 by from Great Customer Service I had trouble sync device with IPhone but Excellent Customer Service.
Date published: 2017-03-11
Rated 4 out of 5 by from Well done! I've been using Mio products for several years but I've always refused to use them other than for my runs. It was mainly due to the design which I didn't like. This one, thanks to its slick look, great PAI concept and ease of use, I've started wearing it all the time, i.e. track my workouts, sleep and in between.So far, I have two comments:1. The PAI app seems to have a problem with the PAI count. It doesn't match what SLICE shows (which has the "correct" measure).2. I would be interested in seeing how many calories are burnt in an activity. Similar to PAI, it would be good to see the overall day calories, but also during the activity (and make it accessible in the activity stats in the PAI app).
Date published: 2017-02-08
Rated 5 out of 5 by from Interesting product I have been using Mio Slice daily for over a month now and I'm globally satisfied with the product.Some issues to correct:1. During training - my training is mostly functional training, some cardio and powerlifting, sometimes it looses the measurement, providing an erroneous PAI.2. Sometimes it does not turn on the screen when we turn the wrist for time or data.3. Data storage: only 7 days is too short and we should be able to either download the data to some application or get it stored in a site, such as Polar offers.4. PAI application integration: I have Mio Slice and Mio Alpha 2 and lack of PAI and data integration prevents me to use - and "promote"! - the Alpha.Keep the good work and wait for news!
Date published: 2017-05-24
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