Amazon is rolling out its Amazon One payment service to 65 Whole Foods stores in California. The service uses high-tech checkout devices that allow customers to pay simply by scanning their palms. Customers sign up for Amazon One by registering their palmprint with a connected credit card and phone number at special kiosks in participating stores. Once registered, customers can pay for their groceries by hovering their bare hand above the checkout device. The Amazon One rollout is part of the company’s campaign to make it easier and faster for customers to pay, such as with Amazon’s Just Walk Out tech. For more on this story, see The Verge.