*An "eligible American Express® Card" for the UP4™ band means an American Express U.S. Consumer or Small Business credit or charge Card that is not cancelled and that is issued to you by a U.S. banking subsidiary of American Express. Prepaid cards and products, American Express Corporate Cards and American Express-branded cards or account numbers issued by other financial institutions are not eligible. Must have a valid User ID at americanexpress.com for an eligible Card. Only one Card can be connected to an UP4 band and you cannot switch the Card once it is connected. The ability to use your UP4 band to make payments expires as early as 7/31/2019. Works where Amex contactless payments are accepted in the US.
See important terms and limitations at http://amex.co/upterms