Amazon is expanding its latest brick-and-mortar retail experiment beyond an internal employee beta today, letting Amazon Prime members order groceries online for pickup during designated windows at two locations in the company’s hometown.

The broader launch of the AmazonFresh Pickup service, in Seattle’s Ballard and SoDo neighborhoods, also brings new details about how the pickup process works. Amazon says in an online FAQ that it “may use license plates to automatically recognize your vehicle when you arrive,” helping the company quickly match arriving customers with their orders. Customers can opt-out of automatic check-in from their settings.