CNN  — 

Apple unveiled its iPhone 15 lineup along with other major updates during its September keynote event on Tuesday.

The company announced it will switch to USB-C charging from its proprietary Lightning charging cable with the iPhone 15, marking a milestone for the company by adopting universal charging. The change aims to ultimately streamline the charging process across various devices — and brands.

The company also showed off its Apple Watch Series 9 and Ultra 2 smartwatches, with new colors and features including gesture control, and a new iteration of its AirPods Pro wireless earbuds, also with USB-C charging.

But the company will have to show off more than just a new charging system to get users to upgrade. Last month, Apple’s sales fell for the third consecutive quarter. iPhone revenue came in at $39.7 billion for the quarter, marking an approximately 2% year-over-year decline.

Apple on Tuesday said it will not raise prices for the iPhone 15 lineup, which could further incentivize users to upgrade.

Here are the main takeaways from Apple’s Tuesday event:

iPhone 15 lineup is packed with subtle design changes

The latest iPhones are packed with subtle but significant design changes. To start, the iPhone 15 Pro and iPhone 15 Pro Max now feature a titanium casing, allowing the design to be slimmer and thinner than before.

Other design changes on the premium models include a more-advanced 48 megapixel main camera with a larger sensor and a new telephoto lens for 5x optical zoom camera, exclusively on iPhone 15 Pro Max. The new Pro models’ design also features contoured edges and a customizable Action button, which gives the ring/silence button additional controls, from starting a voice memo to writing a note.

Meanwhile, the basic iPhone 15 phones now include updated image stabilization for taking photos and videos, 2x optimization and updated portraits with richer color and better low-light performance. They will also come with the “Dynamic Island” tool – home to alerts, notifications and other controls, in place of the notch – which were previously only available on the iPhone 14 Pro.

Jeff Chiu/AP
Apple shows off the new iPhone 15 Pro after its introduction on the Apple campus Tuesday in Cupertino, California.

The iPhone 15 lineup also includes an Ultra-Wideband chip to power a handful of new features, including one that makes it easier to find friends who share their location in crowded areas.

The iPhone 15 comes in 5 colors (white, black, pink, green and yellow) and in two sizes: A 6.1-inch screen for the iPhone 15 and 6.7 inches for iPhone 15 Pro.

The iPhone 15 will start at $799, and iPhone 15 Pro will start at $999. The iPhone 15 models will be available for pre-order on Friday and for sale in stores on Friday, September 22.

A milestone step toward universal charging

Perhaps the biggest change coming to the iPhone 15 models is that they will now use a USB-C charging cord, ending an 11-year run with Apple’s proprietary Lightning charging cable.

Now Apple customers can use the same USB-C chargers to power their iPhones, iPads and Mac computers — no more scrambling to find the right charger for each device. Apple said a dedicated USB-C controller will allow for transfer speeds of up to 20 times faster than with USB-2 technology for the iPhone 15 Pro.

Samantha Kelly/CNN
The new iPhone 15 models will now use a USB-C charging cord, ending an 11-year run with Apple's proprietary lightning charging cable.

The switch would come less than a year after the European Union voted to approve legislation to require smartphones, tablets, digital cameras, portable speakers and other small devices to support USB-C charging by 2024. The first-of-its-kind law aims to pare down the number of chargers and cables consumers must contend with when they purchase a new device, and to allow users to mix and match devices and chargers even if they were produced by different manufacturers.

Apple will also sell a $29 USB-C Lightning adapter to let people connect their existing Lightning accessories to a USB-C-enabled iPhone or iPad to charge or share data.

The company told CNN that iPhone users can recycle their old Lightning chargers via its in-store recycling program.

Apple Watches get smarter, faster

Jeff Chiu/AP
Apple Watches are displayed during an announcement of new products on the Apple campus Tuesday, Sept. 12, 2023, in Cupertino, Calif.

Apple kicked off Tuesday’s event by announcing the new Apple Watch Series 9, which features Apple’s in-house silicon chip and ultrawideband connectivity. The updated Apple Watch will let users log health data with their voice, use “name drop” to share contact information by touching another Apple Watch and raise their wrist to automatically brighten the display. The Series 9 will come in colors such as pink, navy, red, gold, silver and graphite.

Apple also showed off the second iteration of its rugged Ultra smartwatch line, featuring the updated S9 custom chip and a new UWB chip. It also features more information on the display for more intensive tracking.

The Apple Watch Series 9 will start at $399 and the Ultra is priced at $799. Customers can place orders today and they will be available on September 22.

Finger taps are the future of Apple gestures

From Apple
Apple on Tuesday announced the new Watch Series 9, with new gesture controls and improved connectivity.

Apple is introducing an innovative and unique way to control its new lineup of smartwatches. The Watch Series 9 and high-end Ultra 2 watch will include a new gesture control called Double Tap, allowing allow users to tap their index finger and thumb together twice, to answer or end phone calls, play and pause music, or snooze alarms. The hand gesture can also scroll through widgets, much like turning the digital crown.

The company said Double Tap is enabled by an enhanced neural engine that processes data from sensors and machine learning, and by monitoring the change in blood flow when two fingers are tapped together. It is available starting next month.

A similar hand tap will be used to control the Vision Pro mixed reality headset when it launches next year.

New iPhone features hit next week

Apple’s next-generation software for the iPhone will be available to download starting on Monday, September 18. In June, the company showed off a slew of new tools coming to iOS 17, such as a more accurate autocorrect, a new feature called Live Voicemail that will transcribe a caller’s message in real time, and a NameDrop tool that lets users share their contact information by holding two iPhones close together. The iPhone’s phone app will also reposition the hang up button to the bottom right of the screen, next to other functions.

The update will also bring adaptive audio to the AirPods Pro, which will adjust the noise cancellation and volume based on a user’s surroundings, and introduce conversation mode, which customizes the sound of what you’re listening to and softens when you start speaking to someone nearby.

A leap toward sustainability

Jeff Chiu/AP
The iPhone 15 Pro is displayed after its introduction on the Apple campus, Tuesday, Sept. 12, 2023, in Cupertino, Calif.

Lisa Jackson, Apple’s VP of environment, policy and social initiatives, said that the company’s Watch Series 9 will be Apple’s “first-ever carbon-neutral product,” thanks to efforts to reduce its carbon footprint and to offset emissions with carbon buybacks. She said this has been certified by an independent third-party.

Doubling down on sustainability initiatives, Jackson also said the tech giant will no longer use leather in any new Apple product, including watch bands.

Instead of leather, Apple said it will begin using a new textile that it is calling “fine woven.”

Fine woven will be made of 68% post-consumer recycled content, giving it a significantly lower carbon footprint than leather, Apple said.

“Beyond expected improved performance and incremental innovation embedded into Apple’s new products, it is great to see Apple communicate on sustainability as a new competitive advantage — especially with Apple’s first carbon neutral products,” Forrester Principal Analyst Thomas Husson said in emailed commentary following the event.

– CNN’s Catherine Thorbecke, Jennifer Korn and Aditi Sangal contributed reporting.