Polar M400 vs. Huawei Talkband B2 vs. Withings Pulse Ox vs. Michael Kors Access Sofie vs. Apple Watch Series 4
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| PolarM400Remove Buy Now | HuaweiTalkband B2Remove Buy Now | WithingsPulse OxRemove Buy Now | Michael KorsAccess SofieRemove Buy Now | AppleWatch Series 4Remove Buy Now |
Basic Info | |||||
| Suggested Price | $200 | $180 | $120 | $395 | $329 |
| Release | 2014 | 2015 | 2014 | 2017 | 2018 |
Activity & Fitness | |||||
| Calories | |||||
| Cycling (Bicycling) | |||||
| Distance | |||||
| Heart | n/a | ||||
| Oxygen | |||||
| Sleep | |||||
| Steps | |||||
| Swim | |||||
Battery | |||||
| Duration | 8 hours to 30 days | 3 days | 2 weeks | 1 day | Not Yet |
| Rechargeable | |||||
Compatibility | |||||
| Android | |||||
| iOS | |||||
| Windows Phone | n/a | n/a | n/a | ||
| Mac | n/a | n/a | |||
| Windows | n/a | n/a | |||
Connectivity | |||||
| Bluetooth | |||||
| Cellular | |||||
| GPS | |||||
| NFC | |||||
| Wi-Fi | |||||
Display | |||||
| Color | blue | ||||
| Resolution | n/a | 128 x 88 | 128 x 32 | 390 x 390 1.19 inches | 384 x 480 |
| Size | n/a | 0.73 inches | n/a | 1.78 inches | |
| Touch | Swipe | AMOLDED | |||
| Type | n/a | PMOLED | OLED | MicroLED | |
Functions | |||||
| Audio Speaker | Alerts only | Bluetooth | |||
| Clock | |||||
| Phone | |||||
| Vibration | |||||
| Voice | |||||
Hardware | |||||
| Accelerometer | |||||
| Barometer or Altimeter | |||||
| Ultraviolet Sensor | |||||
| Water Resistance | 3 ATM | IP57 | 1 ATM | Not Yet | |
Notifications | |||||
| Phone | |||||
| Emails | |||||
| Texts | |||||
Software | |||||
| Operating System | n/a | n/a | n/a | Android Wear 2.0 | Watch OS 5 |
| Apps | |||||
| Music | |||||