The BR93L46RFVM-WTR is a contactless smart card chip designed by ROHM, a Japanese electronics company. The chip operates on a 13.56 MHz frequency and features a total of 2048 bytes of EEPROM memory, which can be used to store up to 16,384 different items. The chip also has a built-in contactless card reader, which allows it to be used with any compatible contactless card. Additionally, the BR93L46RFVM-WTR can also work with magnetic stripe cards, allowing it to be used in a variety of applications.