Whole Foods customers will soon be able to pay with their palms when shopping at stores nationwide.

Amazon announced Thursday it was bringing Amazon One’s palm recognition service to more than 400 Whole Foods locations across the U.S. By the end of the year, all 500-plus Whole Foods Market locations will offer the service.

“This means Whole Foods Market customers who choose to use Amazon One will no longer need their wallet or even a phone to pay—they can simply hover their palm over an Amazon One device. For Prime members who link their Amazon One profile with their Amazon account, savings will automatically be applied. It’s that simple,” Amazon said in a statement.

To use the service, customers have to connect their palm print with a stored credit card. After that, they wave their hand over a kiosk to check out.

The service –used at select Panera Bread locations as well as Coors Field, home of the Colorado Rockies MLB team – is already offered in a handful of states including Arkansas, Louisiana, Mississippi and Texas.