A discrete electrode telemetry device includes a single female snap receptor in a leadless body. The single female snap receptor attaches to a single male snap post of a single discrete standard circular disposable electrode patch, wherein the sensor comprises a plurality of plug-in interface ports for multiple use reference electrodes on the leadless body thereof. A multiplexor circuit is engineered to multiplex and combine a plurality of signal data collected from the interface ports as an output thereof. A wireless transmitter module is disposed in connection with the single female snap receptor, the wireless transmitter configured to transmit the piecewise multiplexed and combined signal data to a smart phone based on a connection and a disconnection of the single female snap receptor thereto. Furthermore, a spooled memory stores and relays the plurality of signal data for a multiplexed and a composite transmission from the wireless transmitter module.