How to preorder the Apple Watch SE 3, Apple Watch Series 11, and Apple Watch Ultra 3

Here is a 194-word summary of the key points from the news article: Apple has announced three new Apple Watch models - the Apple Watch SE 3, Apple Watch Series 11, and Apple Watch Ultra 3 - all of which are available for preorder starting today. The Apple Watch SE 3 starts at $249 and features an always-on display, sleep tracking, and 5G connectivity on the cellular model. The Series 11 starts at $399 and adds a blood flow sensor for detecting hypertension, along with a 24-hour battery life. The high-end Apple Watch Ultra 3 starts at $799 and has a larger display, 48-hour battery life, and satellite connectivity for messaging when cellular is unavailable. All three new watches will launch on September 19th running the latest watchOS 26 software update, which includes new features like an AI-powered Workout Buddy. The update will also be available for older Apple Watch models on September 15th. The article provides details on where each model can be preordered from Apple, with links to the specific product pages.