Maintains its effectiveness over time. Everything and every function works as expected. Locating the phone is essential, and it can be found there. The training has met all of my needs. Outstanding capability for toggling between musical tracks. determining the amount of oxygen present (by the way, they measured it in the hospital and measured it for hours, everything coincided). Sleep regulation (there is a negative aspect to this in that if you woke up in the middle of the night but didn't get out of bed but instead just laid there, it may be regarded as REM sleep rather than an awakening). The count of the steps is accurate. No questions. When it comes to cooking, having a timer and a stopwatch at your disposal is really helpful. The fact that it shows all incoming calls and notifications is quite helpful. It's impossible to not overlook something. When I have a child in my arms, it is no longer necessary for me to pull out my phone every time I get a notification. Instead, I can check my watch and determine the level of urgency associated with the message. When I first started using them, I didn't know why I needed so many functions, but now I can't see how I ever got by without them.
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