Contactless readers are devices that allow users to make payments or access information without physically touching the reader. They use technologies like RFID (Radio Frequency Identification) or NFC (Near Field Communication) to communicate with contactless cards or smartphones. When a user brings their card or phone close to the reader, the device can quickly process the transaction or retrieve data. These readers are commonly found in places like retail stores, public transportation, and event venues. They offer a convenient and efficient way to complete transactions, reducing the need for cash or swiping cards, which can enhance the overall customer experience.