The present invention describes a system and a method for a baseband near-field magnetic stripe data transmitter (MST) device that transmits payment card data from a smart-phone, or other electronic device, into a Point of Sale (POS) transaction terminal. The MST device includes a driver and an inductor. The MST receives magnetic stripe data comprising payment card data, processes the received magnetic stripe data and emits high energy magnetic pulses comprising the processed magnetic stripe data that are then received remotely by the magnetic stripe reader of the POS.