Mi Smart Band 4 is an affordable fitness band from Xiaomi. With this, the fourth iteration of the Mi Band, Xiaomi has introduced a colour display and swim tracking, and still claims to offer 20-day battery life. The Mi Band lineup began with a product that didn't even have a display and now we get a device with an AMOLED colour display and lots of watch faces, which are nice to have. The Mi Smart Band 4 costs a little more than the Mi Band 3, but are its new features worth the asking price? We used it for a week to find out.
Mi Smart Band 4 price in India starts from ₹ 1,450. The lowest price of Mi Smart Band 4 is ₹ 1,450 at Flipkart on 1st November 2025.
| Brand | Mi |
| Model | Smart Band 4 |
| Price in India | ₹1,450 |
| Model Name | Band 4 |
| Color | Black |
| Ideal For | Unisex |
| Material | Thermoplastic |
| Suitable For | Health, Lifestyle |
| Touch Enabled | Yes |
| Water Resistant | Yes |
| Dial Shape | Rectangle |
| Display Resolution | 120 x 240 RGB |
| Display Type | AMOLED |
| Battery Life (Days) | 20 |
| Battery Type | Lithium Ion (Li-ion) |
| Charge Time (hours) | 2 |
| Battery Capacity (mAh) | 135 |
| Shock Resistant | Yes |
| Water-Resistant Depth (metres) | 50 |
| Wi-Fi Enabled | No |
| Bluetooth Enabled | Yes |
| Bluetooth Version | v5.0 |
| Compatible Devices | Android, iOS Phones |
| Calories Burned | Yes |
| Distance Covered | Yes |
| Heart Rate Monitor | Yes |
| Phone Notifications | Yes |
| Sleep Tracking | Yes |
| Step Counter | Yes |
| Treadmill | Yes |
| Exercise | Yes |
| Outdoor Running | Yes |
| Cycling | Yes |
| Walking | Yes |
| Swimming | Yes |
| Accelerometer | Yes |
| Gyroscope | Yes |
| Optical Heart Rate Sensor | Yes |
| Weight (grams) | 22.1 |
| Width (mm) | 45.72 |
| Height (mm) | 12.7 |
| Depth (mm) | 17.78 |