Fans who attend Brooklyn Nets games at the Barclays Center can pay for game-day purchases with their smartphones.

The Brooklyn eWallet—introduced Nov. 5 by American Express Co., the Nets and Barclays Center—allows for digital payments at concession stands for all arena events.

After downloading the Nets application for iPhone or Android mobile devices, fans can store up to 10 payment sources, such as credit or debit cards, and use them to make payments via a QR code scanner in the eWallet.

“This pilot program continues our innovative partnership with the Nets and Barclays Center to redefine the ways that fans connect and experience events,” Joanna Lambert, senior vice president of product development and management for American Express, said in a statement.

As part of the Barclays Center Round Up charity program, customers can round up purchases to the nearest dollar, with proceeds going to groups such as the Brooklyn Hospital Center and Brooklyn Nets Assist, a community support charity.

Barclays Center, which opened in September 2012, also hosts events such as boxing, college basketball and concerts. It will become the home of the National Hockey League’s New York Islanders in 2015.

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