United States Wearable Payments Devices Market By Type (Smartwatches, Fitness Trackers, Payment Wristbands), By Technology (Barcodes, Contactless Point of Sale (POS) Terminals, Near Fields Communication (NFC), Quick Response (QR) Codes, Radio Frequency Identification (RFID)), By Application (Fitness, Healthcare, Retail, Transportation, Bar & Restaurants, Entertainment Centers, Others), By Region,