The 2015 Apple iPad Pro (1st Gen) was a groundbreaking large-format tablet, featuring a big 12.9-inch Retina display, the powerful A9X chip, and available in 32, 128, or 256GB storage. Key features included a four-speaker audio system, Touch ID, support for the Apple Pencil and Smart Keyboard, and a premium aluminum design, making it a productivity powerhouse for its time.