Polar M400 vs. Xiaomi Mi Band 2 vs. Huawei Watch 2 vs. Diesel On Full Guard vs. Sony SmartBand
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| PolarM400Remove Buy Now | XiaomiMi Band 2Remove Buy Now | HuaweiWatch 2Remove Buy Now | DieselOn Full GuardRemove Buy Now | SonySmartBandRemove Buy Now |
Basic Info | |||||
| Suggested Price | $200 | $23 | $350 | $325 | $100 |
| Release | 2014 | 2016 | 2017 | 2017 | 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 | 48 hours | 1 day | 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 | 480 x 480 | 454 x 454 | NA |
| Size | n/a | 0.42 inches | 1.38 inches | 1.4 inches | NA |
| Touch | NA | ||||
| Type | n/a | OLED | P-OLED | OMOLED | NA |
Functions | |||||
| Audio Speaker | Alerts only | ||||
| Clock | |||||
| Phone | |||||
| Vibration | |||||
| Voice | |||||
Hardware | |||||
| Accelerometer | |||||
| Barometer or Altimeter | |||||
| Ultraviolet Sensor | |||||
| Water Resistance | 3 ATM | IP67 | IP68 | IP67 | IP58 |
Notifications | |||||
| Phone | |||||
| Emails | |||||
| Texts | |||||
Software | |||||
| Operating System | n/a | n/a | Android Wear 2 | Android Wear 2.0 | NA |
| Apps | |||||
| Music | |||||