A beautiful transformation
Get a wider, more colourful 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
Whether you're doing high-speed battle rope training or an aerobic battle rope workout, Mi Smart Band 4 will track your heart rate, calories burned and more.
Tracks your pace and step count Maintain a safe workout, whether you're running short or long distance.
5 ATM water resistant up to 50m Recognizes 5 different swim styles Records 12 data sets including swimming pace and stroke count
5 core data sets Helps you improve power walking efficiency
Check your heart rate in real time to make sure you get the best workout as you climb mountain roads or dash around the city.
A reinvigorated transformation
Improving your daily energy starts with understanding your sleep patterns.
Accurately tracks light and deep sleep as well as heart rate during sleep to help you adjust your sleep patterns.
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.
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.
Water Resistance Rating
120 x 240 RGB
Up to 400 nits (max brightness), brightness adjustable
On-cell capacitive touchscreen
2.5D tempered glass with anti-fingerprint coating
Single touch button (wake up, go back)
Wrist strap type
Removable wrist strap
(Mi Smart Band 4 is compatible with Mi Band 3 straps)
Wrist strap material
Adjustable wrist strap length
3-axis accelerometer + 3-axis gyroscope;
PPG heart rate sensor;
Capacitive proximity sensor
2Pin Pogo Pin
= 2 hours
Up to 20 days
Android 4.4, iOS 9.0 or above
Great as a watch
Fantastic batt..." Read More "So for this price you get a really small and light wristband watch with an amazing battery life. I have had the watch for 2 weeks now and have done 3 sessions of mountain biking and 8 sessions of gym with this watch. I have not used it under water or had it wet apart from splashing while washing my hands so can't comment on water resistance (take it off during showers).
Great as a watch
Fantastic battery life
I like the weather feature
Nice soft strap
Small and comfortable
Decent step count accuracy
Inaccurate heart rate while exercising out by 30-50 beats per minute
Inaccurate sleep tracker (I mainly got it for that) 15 nights of use in comparison to my sleep cycle app a fair bit off. Sleep cycle app used for years so i know its accurate as my sleep is not the best.
While training at the gym with a hoodie, as i was sweating and the bottom of my sleeves absorbed the sweat around the wrist area where my band is it started to be sensitive on the screen, where by it will pause workouts and press different options while i was lifting, which i found annoying as i had to roll up the sleeve.
Unfortunately cant skip spotify playlist songs
3 start is reasonable in my view as its cheap electronic watch if nothing else, unfortunately poor heart rate monitor, poor sleep tracker which is mainly why i got the device in the first place." Read Less