A chip contains information. For example, when you make a legitimate purchase with an RFID chip card, a 'reader' or terminal sends an interrogating signal, (also called a 'ping') to your chip. Almost all RFID chips today broadcast your personal and financial information when pinged at a 13.56 MHz (megahertz) frequency in order for the financial institution to approve or deny the transaction. 13.56 MHz is a universal frequency used by stores, banks, and hackers. The same frequency is also used by smartphones, like Apple Pay, Google Pay, Android Pay, and Samsung Pay, among others. This is why 13.56 MHz is the frequency that SCRAMBLER protects.