Use this card at Uni-President Supermarket stores in Taiwan that can issue unified supermarket invoices. It is valid for purchasing goods/services that are eligible for such invoices. At checkout, present the barcode (set mobile screen to maximum brightness for scanning). Balance inquiries and transaction details can be accessed at participating stores or via the Uni-President Supermarket Product Card Consumer Service Hotline: 0800-886-711. For more information, visit: http://www.7-11.com.tw/service/card.asp