New Apple Watch Series 6 GPS
The Apple Watch Series 6 (GPS, 40mm) may have just been released last month, but you can already get one for $374.98 shipped, this week only, originally $399. Unlike its predecessors, this latest model can measure the oxygen saturation of the user’s blood, which represents the percentage of oxygen being carried by red blood cells from the lungs to the rest of the body. The reading you get indicates how well this oxygenated blood is being delivered throughout the body. Product page. Read more for a hands-on video review and additional information.

Apple Watch Series 6 (GPS, 40mm) - Space Gray Aluminum Case with Black Sport Band
  • GPS model lets you take calls and reply to texts from your wrist
  • Measure your blood oxygen with an all-new sensor and app
  • Check your heart rhythm with the ECG app

Four clusters of green, red, and infrared LEDs, along with the four photodiodes on the back crystal of Apple Watch measure light reflected back from blood. It then uses an advanced custom algorithm built into the Blood Oxygen app to measure blood oxygen between 70 percent and 100 percent. You can either take on-demand measurements or periodic background measurements occur when inactive, including during sleep.

Apple Watch Series 6 completely redefines what a watch can do. With powerful new features, including a Blood Oxygen sensor and app,1 Apple Watch becomes even more indispensable by providing further insight into overall well-being,” said Jeff Williams, Apple’s chief operating officer.

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