Polar M400 vs. Xiaomi Mi Band 2 vs. Sony SmartBand
 | | | |
| PolarM400Remove Buy Now | XiaomiMi Band 2Remove Buy Now | SonySmartBandRemove Buy Now |
Basic Info | |||
| Suggested Price | $200 | $23 | $100 |
| Release | 2014 | 2016 | 2014 |
Activity & Fitness | |||
| Calories | |||
| Cycling (Bicycling) | |||
| Distance | |||
| Heart | n/a | ||
| Oxygen | |||
| Sleep | |||
| Steps | n/a | ||
| Swim | |||
Battery | |||
| Duration | 8 hours to 30 days | 20 hours | 5 days |
| Rechargeable | |||
Compatibility | |||
| Android | |||
| iOS | |||
| Windows Phone | n/a | NA | |
| Mac | n/a | NA | |
| Windows | n/a | NA | |
Connectivity | |||
| Bluetooth | |||
| Cellular | |||
| GPS | |||
| NFC | |||
| Wi-Fi | |||
Display | |||
| Color | NA | ||
| Resolution | n/a | n/a | NA |
| Size | n/a | 0.42 inches | NA |
| Touch | NA | ||
| Type | n/a | OLED | NA |
Functions | |||
| Audio Speaker | Alerts only | ||
| Clock | |||
| Phone | |||
| Vibration | |||
| Voice | |||
Hardware | |||
| Accelerometer | |||
| Barometer or Altimeter | |||
| Ultraviolet Sensor | |||
| Water Resistance | 3 ATM | IP67 | IP58 |
Notifications | |||
| Phone | |||
| Emails | |||
| Texts | |||
Software | |||
| Operating System | n/a | n/a | NA |
| Apps | |||
| Music | |||