The technology used in NFC (Near Field Communication) payment systems is a type of wireless communication protocol that enables short-range data exchange between devices. Typically operating over distances of 4 centimeters or less, NFC allows for seamless transactions involving mobile phones, contactless credit cards, and other devices. When users tap their NFC-enabled device on a payment terminal, the data is transmitted securely, facilitating quick and convenient transactions without the need for physical contact. This technology enhances customer experience by streamlining payments, making it increasingly popular in mobile payment applications and smart retail solutions.