| Power |
| Battery | removable |
| The waiting time | 576 h |
| Additional information | sensor heart rate Polar H7 - optional; package contents: watch, software, charger USB, user manual in Russian, warranty card |
| Connector type for charging | micro USB |
| While working in active mode | 8 hours |
| Screen |
| Type | monochrome, backlit |
| Resolution | 128x128 |
| The presence of the screen | Yes |
| Design and appearance |
| Weight | 55 g |
| Moisture | there, WR30 (3 ATM) |
| Body-colored | black, white, blue |
| Color bracelet/strap | black, white |
| The way of displaying the time | digital |
| Adjust the length of the bracelet/strap | Yes |
| General characteristics |
| Type | smart watch |
| Vibration | Yes |
| Platform support | Android 4.3, iOS, Windows, OS X |
| Additional functionality |
| Timer | Yes |
| Sensors | accelerometer, compass, thermometer, altimeter, optional heart rate monitor |
| Stopwatch | Yes |
| Monitoring | calories, physical activity |
Comment:
Polar M400 long-term user
Jack of all trades that runs on its own steam of promises and hype. And does nothing as expected! You get running watch that failed me 3 times during long runs. And actually was unusable for a first week as bought due to software error in firmware. Device that had strap replaced after 4 months of use , and on my expense because turns out there is no service near me. Device that after 6 month still doesn’t use internal sensors for cadence and probably newer will, but hey they only promised it somewhere in February 2015. And they probably need to to sell their ultra large, egg size foot-pod…
Android users: device doesn’t connect with anything usable (Myfitnesspal, UA record…)
Notification: still no go. Maybe this month…Maybe
Good things: Every now and then they post promises that make you feel good about yourself and your past decision to spend money on it.
So if you are into promises clearly good choice.