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Apple says the smartwatch series has become an indispensable part of the daily lives of millions of people around the world.

Jeff Williams, Apple's Chief Operating Officer, unveiled the latest generation of the new smartwatch on stage at a media event at the Steve Jobs Theater.

Known as Apple Watch Series 4, the company claims that the new wearable has been rebuilt from the ground up.

The digital crown, which is used to scroll through lists, has been overhauled to include haptic feedback. The red dot indicator of the LTE is now a small ring.

Apple says that the speaker on the Apple Watch Series 4 is now 50 percent louder thanks to a redesign.

The Apple Watch Series 4 has a screen that is 30 percent larger than its predecessor, with the screen now extending to the very edge of the device.

The updated Digital Crown now includes haptic feedback and offers a more mechanical and responsive feel through the sensation of incremental clicks

The updated Digital Crown now includes haptic feedback and offers a more mechanical and responsive feel through the sensation of incremental clicks

Apple says the OLED screen rotates around the edge of the wearable to ensure that the physical footprint does not increase too much compared to previous generations.

The Watch will be available in two sizes – 40 mm and 44 mm.

For comparison, the assortment of the previous generation Apple Watch was available in variations of 38 mm and 42 mm.

On the larger display of the Series 4, the operating system, watchOS 5, can display more information through Apple's built-in app complications.

These have been redesigned to include more information, including photos of favorite contacts.

The Apple Watch Series 4 is powered by the modified dual-core 64-bit processor, known as the S4, which is designed and made by Apple. This is linked to a new GPU.

According to the company, these internal improvements lead to performance that is twice as fast as previous generations.

Jeff Williams, Apple's chief operating officer, talks about the Apple Watch Series 4 at the Steve Jobs Theater, at an event to announce new Apple products

Jeff Williams, Apple's chief operating officer, talks about the Apple Watch Series 4 at the Steve Jobs Theater, at an event to announce new Apple products

Jeff Williams, Apple's chief operating officer, talks about the Apple Watch Series 4 at the Steve Jobs Theater, at an event to announce new Apple products

A new built-in accelerometer and gyroscope track motion data eight times faster than Apple Watch Series 3.

With these new sensors, Apple can fall unintentionally for the first time.

The Apple Watch Series 4 analyzes the trajectory and detects when the wearer raises his arms to protect himself during a fall, a shortcut pops up to ask people for help quickly.

If the smartwatch detects that the wearer has been immobile for one minute, it will automatically start a call and send a message to your emergency contact.

With Apple Watch Series 4, users can perform ECG measurement from the wrist using the new ECG app, which uses the electrodes built into the Digital Crown and the new electrical heart rate sensor in the back crystal.

To create an ECG, users just have to open the app and put their fingers on the crown to read. This takes approximately 30 seconds to complete.

It is the first ECG product that is offered to consumers without calls.

It can classify whether the heart beats in a normal pattern or whether there are signs of atrial fibrillation (AFib), a heart condition that can lead to serious health complications.

All recordings, the associated classifications and any noted symptoms are stored in the Health app in a PDF that can be shared with doctors.

With Apple Watch Series 4, users can read an ECG value from the wrist using the new ECG app, which uses the electrodes built into the Digital Crown

With Apple Watch Series 4, users can read an ECG value from the wrist using the new ECG app, which uses the electrodes built into the Digital Crown

With Apple Watch Series 4, users can read an ECG value from the wrist using the new ECG app, which uses the electrodes built into the Digital Crown

Despite the larger display and the thinner profile, Apple says the Series 4 has the same lifespan of 18 hours as its predecessor.

Apple Watch Series 4 with GPS starts from $ 399, with pre-orders available on Friday, September 14, 2018. There is a version of the smart watch with cellular connectivity that starts from $ 499 for the 40 mm model.

Both new smart watches will be sent on September 21, 2018.

The previous version of the Watch – known as Series 3 – will still be available at Apple, priced at $ 279, the company says.

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