Full colour display and heart rate monitor
Pay in installments of $28.75 with
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Shipping Estimate
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- USA
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Ships within 48 hours · Estimated delivery Jul 18 - Jul 23
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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
4.1 ★★★★★
Based on 25 reviews
Sort
Product Reviews
★★★★★ 5
Switched from Sony and honestly surprised
Style: 2026 Model, Size: 65-Inch
Been using Sony TVs forever, so I was a little skeptical when I made the switch. But honestly, ten days in and I keep finding myself just... sitting down to watch something because the picture looks so good. The colors are genuinely impressive — rich without looking overdone. HDR content especially looks great, deep blacks and bright highlights without that weird bloomy halo effect I've seen on other TVs.
I've watched movies, binged some shows, and played games on it over the past week and a half. No complaints on any front. Gaming feels smooth — the 144Hz panel makes a real difference and the TV switches modes automatically which I didn't even notice until I looked it up.
Sound is better than I expected too. I kept waiting for it to fall apart on dialogue or get muddy during action scenes, but it stays pretty balanced throughout. Still have my soundbar but haven't felt the need to plug it in.
The Alexa integration is probably what I use most day to day. One time I was already in another room and realized I'd left the TV on — just told Alexa to turn it off without getting up. Small thing, but that's exactly the kind of convenience that makes you actually appreciate it.
If you're coming from a Sony like me, the adjustment is basically nothing. Genuinely happy with this one.
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Reviewed in the United States on April 5, 2026
★★★★★ 5
Excellent tv
Style: 2026 Model, Size: 55-Inch
Great TV. Fantastic deep color. Extra, with built-in Fire Stick. So easy to set up with this. Sound is superb. Overall a great tv at this price.
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Reviewed in the United States on April 25, 2026
★★★★★ 1
Not worth the money
Style: 2026 Model, Size: 55-Inch
Nothing I wanted. Totally disappointed.
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Reviewed in the United States on April 22, 2026
★★★★★ 5
Setup Is SOO Easy - Compact Size - Intuitive - Automatic Device Connections
Size: 1 add-on extender, Configuration: without eero Plus, Size: 1 add-on extender, Configuration: without eero Plus
We were hoping to solve an issue we were having with our Wifi setup which prevented us from reliably connection to our two alley cameras and interior garage camera/door opener. These 3 devices were just a bit too far from our Wifi to get a strong connection to stream a video feed, though strong enough to stay connected. However, after install this extender, the signal is super strong and connecting to these cameras is much faster.
Setup and usage was also SUPER simple. Since we are already running an Eero setup with 2 routers, install was as simple as plugging the device in, opening the app and clicking through just a couple buttons to start the automatic process for building out the network. Best of all, each of the alley devices are automatically connecting to the extender without needing to manually assign them, so convenient! If you're concerned about compatibility, we had no issues running this with the Eero 6e routers found here https://amzn.to/41kfEv5 I can't speak to all the compatible options but the Eero 6 and 6e routers are a sure bet.
So for us, the coverage and stability of the network is now excellent across all devices and we finally have proper functionality of all our connected devices.
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Reviewed in the United States on March 22, 2026
★★★★★ 5
So Far So Good
Size: 1 router, Configuration: without eero Plus
My modem crashed a few months ago and Spectrum had to replace the system. I learned during that installation that I was being charged an extra $10/month for my router. Didn't realize that for 5 years, I was only "renting" my router. Which has been an absolute waste of $600. During the initial install, I was not informed of that and I have never seen an actual paper statement for my bill breaking down my plan.
My first Spectrum router was very spotty towards the back of my house (1050sq ft. house) and the new router which was supposed to be an upgrade to Wi-Fi 6, was even worse. My phone would lose connection to the new router on my front porch which is 5 feet away from my router. I initially thought that all I needed was an extender and that is how the Spectrum guy and I got on the subject because I am NOT very tech savvy. I had already been looking at the Eero router and he recommended it. I found the one that is compatible to my internet plan (400Mbps) and went for it while it was on sale. This router is very well packaged. Very pretty packaging, too.
OMG!! Super super easy to install. Your grandparents could install this. The only thing that I recommend is being sure of your password which you should be able to find in your providers app (at least I can with Spectrum). If you do happen to forget one digit to your password, and you accidentally change your password, you will have to reconnect each device individually.
This router was compatible with my internet plan and provider. I'm very happy with the quality, signal strength, functionality. It has been very reliable for the three days that I have had it. I have not lost signal once. Not even on my front porch. My phone is now showing that I am connected to Wi-Fi 6 when before, it kept dropping it and dropping back down to 5G. Even with the 5G, it would buffer really bad.
I got this on sale and I do think that the price is competitive for how well this router performs. The app is super easy to navigate and every device that is linked to your router is located in the app. You can monitor what devices are connecting to your router.
I do think that this Eero router was the upgrade to my internet plan. I would recommend saving yourself the cost to "rent" your router through your service provider and upgrading to the Eero router. This will pay for itself in 6 months now that I am not "renting" my router.
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Reviewed in the United States on November 19, 2025
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