With a solid foreign trade knowledge, familiar with the production process, inspection and production improvement of the product, the product control is more deeply in place, with good communication, analysis and teamwork awareness.
Is the sleep track recorded by the fitness tracker reliable?
Many people buy smart wearable devices, such as a fitness tracker that can record sleep, in order to monitor their sleep. There are many kinds of sleep trackers on the market, and the price is about 200 yuan. So, are they reliable? The standard sleep monitoring device is called “polysomnography” (English called Polysomnography, PSG for…
