A device and method for waveform transmission of transaction card data to a merchant point-of-sale device are provided. The device includes a memory device for storing data, a processor, and a transmitter. The device is programmed to receive transaction card data that mimics data stored within a magnetic stripe associated with a transaction card, convert the transaction card data to a first data file for storage within the memory device, transmit the first data file to the transmitter, and transmit a first waveform from the transmitter to the POS device, wherein the first waveform includes changes in a magnetic field that represent the transaction card data.