Mi Smart Band 4
Specifications
| Parameter | Specification |
|---|---|
| Weight | 22.1 g |
| Display Type | AMOLED |
| Screen Size | 0.95" |
| Resolution | 120 × 240 RGB |
| Colour Depth | 24-bit |
| Brightness | Up to 400 nits (adjustable) |
| Touchscreen | On-cell capacitive |
| Protection | 2.5D tempered glass, anti-fingerprint |
| Button | Single touch button |
| Body Material | Polycarbonate |
| Water Resistance | 5 ATM |
| Strap Type | Removable (compatible with Mi Band 3 straps) |
| Strap Material | TPU |
| Strap Width | 18 mm |
| Adjustable Length | 155–216 mm |
Hardware
| Parameter | Specification |
|---|---|
| RAM | 512 KB |
| ROM | 16 MB |
| Sensors | 3-axis accelerometer, 3-axis gyroscope, PPG heart rate sensor, capacitive proximity sensor |
| Motor | Rotor vibration motor |
Connectivity
| Parameter | Specification |
|---|---|
| Wireless | Bluetooth 5.0 BLE |
| App | Mi Fit |
| System Requirements | Android 4.4 / iOS 9.0 or newer |
Battery
| Parameter | Specification |
|---|---|
| Battery Type | Li-Po 135 mAh |
| Charging | 2-pin pogo pin |
| Charging Time | ≤ 2 hours |
| Standby Time | Up to 20 days |
Sports Functions
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6 workout modes: treadmill, exercise, outdoor running, cycling, walking, pool swimming
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Step counting, distance & calories tracking
Health Monitoring
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Continuous heart-rate monitoring
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Resting heart rate & charts
-
Sleep tracking
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Goal setting & activity alerts
-
Idle reminders
Smart Features
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Call & message notifications
-
App notifications & calendar alerts
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Alarm & stopwatch & timer
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Weather forecast
-
Music control
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Find my phone
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Phone unlock
-
Night mode & Do Not Disturb
-
Watch faces (preset & custom)
-
OTA updates
-
Battery level display
-
Bluetooth broadcasting
