Iwatch

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Additional sensors integrated into the Watch include an accelerometer, gyroscope, and barometer, which are used to determine device orientation, user movement, and altitude. The back of all Apple Watches is equipped with a Heart Rate Monitor, which projects infrared and green light from light-emitting diodes (LEDs) onto the user's skin and photodiodes measure the varying amount of light reflected. Because blood absorbs green light and reflects red light, the amounts of each type of reflected light are compared to determine heart rate. The Watch adjusts the sampling rate and LED brightness as needed. Starting with the Series 4, Apple added electrical sensors to the Digital Crown and back, allowing the Watch to take electrocardiogram (ECG) readings; the device won FDA clearance in October 2018, becoming the first consumer device capable of taking an ECG. A blood oxygen monitor was added with the Series 6 in 2020, albeit as a "wellness" device not capable of diagnosing a medical condition. The blood oxygen monitor added red LEDs to the back, allowing the watch to determine oxygen levels by measuring blood color. The Watch SE reverted to the capabilities of the Series 3, dropping the electrical sensors and blood oxygen monitor.

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LUMINOX WATCH CO. Women's STEEL COLORMARK SERIES watches ...
LUMINOX WATCH CO. Women's STEEL COLORMARK SERIES watches ...
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Raised Numerals Watch Black Face | Simon Carter
Raised Numerals Watch Black Face | Simon Carter
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Antiques Atlas - A Mid-size Tempus Wrist Watch, Circa 1950
Antiques Atlas - A Mid-size Tempus Wrist Watch, Circa 1950
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Antiques Atlas - A Gents 1970s Seiko Automatic Wrist Watch
Antiques Atlas - A Gents 1970s Seiko Automatic Wrist Watch
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Antiques Atlas - Gents 1960s Henri Sandoz Hand Winding ...
Antiques Atlas - Gents 1960s Henri Sandoz Hand Winding ...
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Antiques Atlas - Gents 9ct Gold Smiths De Luxe Watch ...
Antiques Atlas - Gents 9ct Gold Smiths De Luxe Watch ...
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Antiques Atlas - A Gents 1950s Rotary Triple Date Wrist Watch
Antiques Atlas - A Gents 1950s Rotary Triple Date Wrist Watch
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Antiques Atlas - Vintage 1960s Gents Talis Hand Winding ...
Antiques Atlas - Vintage 1960s Gents Talis Hand Winding ...
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WT2502 Viridian Green Watch | Simon Carter
WT2502 Viridian Green Watch | Simon Carter
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Antiques Atlas - Gents 9ct Gold Rotary Wrist Watch, 1956
Antiques Atlas - Gents 9ct Gold Rotary Wrist Watch, 1956
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1970 Breitling Navitimer Ref 806 Watch For Sale - Mens ...
1970 Breitling Navitimer Ref 806 Watch For Sale - Mens ...
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OLEVS Black Ultrathin Dial Leather Black Strap Waterproof ...
OLEVS Black Ultrathin Dial Leather Black Strap Waterproof ...
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Police PL14385JS-57 watch - Reaper
Police PL14385JS-57 watch - Reaper
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Antiques Atlas - Gents 9ct Gold Roamer Pall Mall Wrist ...
Antiques Atlas - Gents 9ct Gold Roamer Pall Mall Wrist ...
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Antiques Atlas - Gents 1940s Parker Chronograph Wrist Watch
Antiques Atlas - Gents 1940s Parker Chronograph Wrist Watch
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Antiques Atlas - A Gents 1960s Elco Automatic Wrist Watch
Antiques Atlas - A Gents 1960s Elco Automatic Wrist Watch
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Maserati R8873638001 watch - Legend
Maserati R8873638001 watch - Legend
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ArmourLite Tritium Watch - Isobrite T100 Master Admiral ...
ArmourLite Tritium Watch - Isobrite T100 Master Admiral ...
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wholesale Unisex Blue Watch
wholesale Unisex Blue Watch
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Car Dash Meter Watch (LED)
Car Dash Meter Watch (LED)
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NIKE watch,NIKE
NIKE watch,NIKE
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1956 Rolex Dress Watch 'OCC' Ref. 8952 - Rolex Passion Market
1956 Rolex Dress Watch 'OCC' Ref. 8952 - Rolex Passion Market
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Swatch Silver Chronograph Watch - Buy Swatch Silver ...
Swatch Silver Chronograph Watch - Buy Swatch Silver ...
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126300 | Rolex Luxury 41MM | Men's Swiss Watch
126300 | Rolex Luxury 41MM | Men's Swiss Watch
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Gucci Mens Moonphase Black Leather Strap Watch YA1264045
Gucci Mens Moonphase Black Leather Strap Watch YA1264045
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Bulova Men's Watch Dress 96B220 Quartz - New Fashion Jewels
Bulova Men's Watch Dress 96B220 Quartz - New Fashion Jewels
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Huawei Watch Review: Classy Android Wear Smartwatch, But ...
Huawei Watch Review: Classy Android Wear Smartwatch, But ...
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1962 Omega Speedmaster Watch For Sale - Mens Vintage ...
1962 Omega Speedmaster Watch For Sale - Mens Vintage ...
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The $163,000 Apple watch is clad in gold and encrusted ...
The $163,000 Apple watch is clad in gold and encrusted ...
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Why the $17,000 gold Apple Watch might actually be too ...
Why the $17,000 gold Apple Watch might actually be too ...
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Atlantic Worldmaster Art Deco Black Dial Automatic Watch ...
Atlantic Worldmaster Art Deco Black Dial Automatic Watch ...
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WATCHES | ISSEY MIYAKE WATCH
WATCHES | ISSEY MIYAKE WATCH
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NATO strap heaven, MCW Military Watch Company | SOLETOPIA
NATO strap heaven, MCW Military Watch Company | SOLETOPIA
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Timex Mens Chronograph Watch TW2T21000
Timex Mens Chronograph Watch TW2T21000
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Emerging Australian Watch Brands | The Australian Watch ...
Emerging Australian Watch Brands | The Australian Watch ...
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W26 Smart Watch – Watch 6 – Full Screen Infinity Retina ...
W26 Smart Watch – Watch 6 – Full Screen Infinity Retina ...
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Apple Watch Hermès - Apple
Apple Watch Hermès - Apple
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Replica GUCCI Dive Watch Releases - Best Swiss Breitling ...
Replica GUCCI Dive Watch Releases - Best Swiss Breitling ...
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The $163,000 Apple watch is clad in gold and encrusted ...
The $163,000 Apple watch is clad in gold and encrusted ...
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Rolex Replica Military Submariner Watch
Rolex Replica Military Submariner Watch
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Men's Luminox Field Chrono Alarm Watch 1842 - YouTube
Men's Luminox Field Chrono Alarm Watch 1842 - YouTube
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TAG Heuer Connected Watch launches in New York ...
TAG Heuer Connected Watch launches in New York ...
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Tachymeter (watch) - Wikipedia
Tachymeter (watch) - Wikipedia
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LG G Watch R - Wikipedia
LG G Watch R - Wikipedia
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ShopWU Series 4 Smart Watch (4G + GPS + Waterproof i watch ...
ShopWU Series 4 Smart Watch (4G + GPS + Waterproof i watch ...
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Hiend T500 Smart Watch (4G + GPS + Waterproof+ Bluetooth ...
Hiend T500 Smart Watch (4G + GPS + Waterproof+ Bluetooth ...
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Latest Teardown Reveals Apple Watch Cost
Latest Teardown Reveals Apple Watch Cost
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6 ways the new Apple Watch Series 6 is a bigger upgrade ...
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Apple Watch SE Is Here as the Most Affordable Apple Smartwatch
Apple Watch SE Is Here as the Most Affordable Apple Smartwatch
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Apple Watch Series 3 vs SE vs Series 6: Which model is ...
Apple Watch Series 3 vs SE vs Series 6: Which model is ...
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