Full colour display and heart rate monitor
Pay in installments of $28.75 with
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Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Aug 27 - Sep 1
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
MI SMART BAND 4 BLACKMi Smart Band 4 Step up, live more Full colour display and heart rate monitor Your transformation begins now. Full colour AMOLED touch display View call, text, and app notifications Activity and swim tracking Water resistant up to 50m* 3 axis accelerometer, 3 axis gyroscope Up to 20 days battery* A single charge lasts up to 20 days. Health monitoring 24 7 heart rate monitoring and sleep tracking. A BEAUTIFUL TRANSFORMATION Get a wider, more colourful
Your transformation begins now.
-
Full colour AMOLED
touch displayView call, text, and
app notifications -
Activity and
swim trackingWater resistant up to 50m*；
3-axis accelerometer,
3-axis gyroscope -
Up to 20 days
battery*A single charge lasts
up to 20 days. -
Health
monitoring24/7 heart rate
monitoring
and sleep tracking.
A BEAUTIFUL TRANSFORMATION
Get a wider, more colourful
view right on your wrist.
view right on your wrist.
The all-new full colour AMOLED touch display
that’s 39.9% larger* and brighter than ever before.
Instantly view call, text, app notifications and music in play.
Keep your hands free as you keep up with life.
A MOTIVATIONAL
TRANSFORMATION
Your personal trainer is with
you every step of the way.
A REINVIGORATED TRANSFORMATION
Improving your daily energy starts with
understanding your sleep patterns.
Sleep monitoring
Accurately tracks light and deep sleep
as well as heart rate during sleep
to help you adjust your sleep patterns.
Wristband alarm
A light vibration gently wakes you
up for a more comfortable morning.
Mi Fit app
Records your health data to help you get the most out of life.
A POWERFUL TRANSFORMATION
24/7 Heart rate monitoring
keeps you safe and healthy.
24/7 Heart rate
monitoring
Safeguard your health at all times.
Alerts you when your heart rate is too high.
Idle alerts
Stay active as you get reminders
to get up and get moving.
AN ENDURING
TRANSFORMATION
Stays by your side for 20
days on a single charge.
NOTE:
- * Global Number 1 Company in wrist-worn wearables Source: IDC Worldwide Quarterly Wearables Tracker, wrist-worn devices only, by shipment volume, Q1 2019.
www.idc.com/getdoc.jsp?containerId=prUS45115019
- * Water resistant up to 50m. Water resistance is in accordance with GB/T 30106-2013 standard. Testing performed by the National Quality Supervision and Inspection Center for Watches. Mi Smart Band 4 water resistance report code: QT1902005;
- * Mi Smart Band 4 lasts up to 20 days on a single charge according to Huami Laboratory testing: Tested using default settings, with 30 minute automatic heart rate monitoring enabled, receiving 100 notifications per day, 2 alarms per day, vibrating for 5 minutes, touching the touch button 10 times per day, and syncing with the app once per day. Actual results may differ due to to differences in environment, use and settings.
- * "39.9% larger display size" is in comparison to Mi Band 3. Mi Band 3's display measures 17.26mm in length and 9.66mm in width. Mi Smart Band 4 measures 21.6mm in length and 10.8mm in width. Calculated as (10.8*21.6-9.66*17.26) / (9.66*17.26), the Mi Smart Band 4's display is 39.9% larger than Mi Band 3's display.
- * Images are for reference only, font may be slightly different from actual product.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.0 ★★★★★
Based on 14 reviews
Sort
Product Reviews
★★★★★ 5
Easy to use with great results
Number of Items: 5
Nice product (
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 22, 2026
★★★★★ 5
Good
Number of Items: 10
Nice
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 17, 2026
★★★★★ 5
Quality
Number of Items: 5
Love these have bought plenty of time will buy again
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 14, 2026
★★★★★ 5
Easily accepted sublimation colors evenly,
Number of Items: 5
Easy to sublimate. The spinners soaked in the ink colors beautifully. Easy to open for spin display too. I would purchase again. Good price and the size was correct. Quality was good for the item to be gifted.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 25, 2025
★★★★★ 4
Sub well, flimsy, no cello bags included for resellers!
Number of Items: 10
Sublimate well at 300 degrees for 60 seconds; however, they are definitely Flimsy as compared to smaller spinners and for some reason they are putting 5 to a cello bag! Which means if you are making to resell, you will need to buy cello bags!! This is the first time I've experienced this in hundreds of wind spinners purchased for sublimation. This is a big deal to me because I can't find 10x10 cello bags (and I shouldn't have to) so now my bags will not be the accurate size for the spinner as all of my others are because I sell them!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 10, 2025
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