I took a watch to replace the M400 with a huge reluctance to switch to ANT + (and buy a sensor for a computer, change all sensors for sneakers, a bicycle). There are disadvantages, you need to be aware of them. Pros below: - Triathlon mode and multisport - The presence of a built-in heart rate (if you ran to the track without a sensor) - Fast (faster M400 accurately) finds GPS - Battery - Ability to connect bike sensors to the clock (unlike M400) - Support for BLE sensors Has cons: - Measurement of the night pulse - sometimes the heart rate turns off when you tell the clock that you have woken up, but more often not (you have to restart the watch). If you miss this moment, the watch will drain the battery in a little more than a day. - Insufficient contrast screen - during water training, in bright sunlight, it is difficult to see through the glasses what mode is currently on the screen. - Built-in tests are very poor
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