Apple watch series 4 for sale

The táo apple Watch Series 4 signaled a change in design, including a new larger display, a faster processor, và the key addition of ECG monitoring, giving users more information about their heart health.


● 2018 flagship● Larger edge-to-edge display● kích thước increases lớn 40mm & 44mm● Faster S4 processor● Second-generation optical heart sensor● ECG functionality● Find great hãng apple Watch deals● Discounted prices start at $359


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Launched on September 12, 2018, the táo khuyết Watch Series 4 signaled a departure from the design aesthetic of the táo apple Watch Series 3 in favor of a larger yet thinner smartwatch, one that provided all the bộ vi xử lý core functionality of the original with some new features.

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The táo apple Watch Series 5replaced it when it launched in 2019. The táo khuyết Watch Series 6then took the place of the 2019 modelupon its arrival in September 2020. The táo Watch SE now sits in a new mid-ranged spot next to the táo bị cắn dở Watch Series 3, which lives on as a budget option.


While sharing the same design language as the táo Watch Series 3, the Series 4 enhances the concept by opting for larger displays. Still using a square OLED Retina display with Force Touch, the 38mm and 42mm sizes have been upsized lớn 40mm and 44mm versions.


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The táo bị cắn dở Watch Series 4 has a bigger edge-to-edge display

The resolutions are 324 by 394 pixels in the 40mm version and 368 by 448 pixels in the 44mm, with both capable of producing 1,000 nits of brightness. The screen change to an edge-to-edge thiết kế also results in a display over 30-percent larger than the previous models while still minimizing the physical impact of offering more screen space.


The 44mm models are 38mm wide và 44mm high, with a depth of 10.7mm. The 40mm versions are 34mm wide, 40mm high, & again with a depth of 10.7mm.


Despite the change in kích cỡ making them slightly larger, bands made for earlier models will continue to fit the Series 4.


As usual, one side features the Side Button and Digital Crown, used in concert with the taps & swipes of the main display khổng lồ move through watchOS. Táo bị cắn dở refreshed the Crown once again to show a ring instead of a colored dot, with the black version used to lớn denote the GPS model while red signifies the inclusion of cellular connectivity.


The speakers were redesigned to be 1/2 louder for audio, with the microphone moved lớn the opposite side khổng lồ minimize echoes.


Around the back is the other big external change for the model, with apple refining the optical heart sensor to a second-generation version. The sensor fundamentally functions the same way, shining light into the user"s wrist to search for a pulse in a technique known as photoplethysmography, but rather than taking the size of four circles, there is instead one main circle with a single central port for light.


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The new heart rate sensor is one large sensor instead of four smaller ones

In terms of materials and finishes, the apple Watch Series 4 shipped in aluminum with silver, gold, & space gray finishes for both GPS và Cellular versions, along with a stainless steel option with polished silver, gold, & space đen options for Cellular models.


The hãng apple Watch Edition option was abandoned for a second time, with the previously sold ceramic option not available khổng lồ purchase for this iteration. Instead, all models of the Series 4 have ceramic backs.


However, táo bị cắn dở offeredNike+ versionsin silver & space gray aluminum, complete with exclusive Sports Bands & Loops, and Apple Watch Hermes in polished stainless steel. Both variants included exclusive watch faces.


Apple"s tradition of improving its products over time continues with the táo bị cắn dở Watch Series 4 using the S4 processor, a 64-bit chip with twice the performance of the S3 used in the previous generation. This lends itself lớn running apps smoother than before và launching said apps quickly.

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Along with the processor, change is an upgrade khổng lồ the three-axis gyroscope, with its having twice the dynamic range than previously offered, at up to 32G. Apple also switched over lớn the W3 wireless chip, enabling Wi-Fi connectivity over 802.11n 2.4GHz networks và Bluetooth 5.0 support.


No changes were made to lớn the storage capacity from the Series 3, with users able khổng lồ take advantage of 16 gigabytes, enabling some music to lớn be stored.


Battery life is rated at up khổng lồ 18 hours of usage, though ultimately, this depends on how users actually employ the wearable device each day.


Other onboard elements include GPS, GLONASS, Galileo, QZSS support, a barometric altimeter, water resistance to lớn 50 meters, an ambient light sensor, and tư vấn forApple Pay và GymKit.


The biggest feature of the táo khuyết Watch Series 4 is an electrocardiogram function or ECG. The first consumer device available over the counter lớn offer the feature with U.S. Food & Drug Administration approval, users can use the ECG app on their táo Watch khổng lồ quickly kiểm tra the status of their heart, beyond the pulse.


Users must complete a circuit by touching the Digital Crown with a finger from the arm that isn"t wearing the táo apple Watch, with the rear heart monitoring sensor array being the second point of contact. After 30 seconds, the apple Watch provides a close reading of whether it detects a sinus rhythm, signs of atrial fibrillation (AFib), or an "Inconclusive" result.


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The built-in ECG function uses the Digital Crown

Regardless of what the táo apple Watch advises, the full recording from the reading is offered in the connected iPhone Health app, with the added option to share it with a doctor or other health professional as a PDF.


Unusually for an announced marquee hardware feature, the ECG ứng dụng wasn"t available at launch, with users having lớn wait until táo khuyết added tư vấn in a later software update. In the United States, the feature was part of watchOS 5.1.2, while other markets had longer waits.


The delays were likely due to táo having khổng lồ seek regulatory approval for each market it wanted lớn offer ECG functionality, with its only becoming available once granted.


Since its introduction, the ECG function has been credited with potentially saving the lives of many users. Numerous reports have surfaced where users were alerted khổng lồ signs of atrial fibrillation, prompting a visit to lớn their regular physicians and further medical assistance in some cases.


A feature introduced at the same time as the ECG but also usable on older apple Watch models is irregular heart notifications, where the táo khuyết Watch warns if the user"s pulse is unusually high or low for 10 minutes or longer.


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Fall detection can và has saved lives

The extended dynamic range of the accelerometer also enables a function for detecting if the user has fallen over, including slips, trips, và even car accidents. Once a fall is detected, the táo khuyết Watch will attempt lớn get a response from the user, & if configured to vì so, it can be set khổng lồ alert emergency services & the emergency liên hệ to the event.


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The apple Watch Series 4 has a small red ring on the Digital Crown lớn signify cellular devices