Apple announced its highly anticipated mixed reality headset at its Worldwide Developers Conference, marking the company’s most ambitious hardware launch in over a decade.

The device, priced at $3,499, features dual 4K displays, hand and eye tracking, and seamless integration with iPhone and Mac applications. CEO Tim Cook called it “the most advanced personal electronics device ever created.”

Analysts estimate Apple could sell 1.5 million units in the first year. The announcement sent Apple shares to a record $234, up 4.2% on the day.