ASPECTS OF THE INVENTION INCLUDE MULTI-MODE COMMUNICATION INGESTIBLE EVENT MARKER DEVICES (102,300). INGESTIBLE EVENT MARKER DEVICES (102,300) OF THE INVENTION INCLUDE AN INGESTIBLE COMPONENT COMPRISING A CONDUCTIVE COMMUNICATION MODULE AND AT LEAST ONE ADDITIONAL NON-CONDUCTIVE COMMUNICATION MODULE. THE NON-CONDUCTIVE COMMUNICATION MODULE MAY BE INTEGRATED WITH THE INGESTIBLE COMPONENT OR AT LEAST A PORTION OR ALL OF THE NON-CONDUCTIVE COMMUNICATION MODULE MAY BE ASSOCIATED WITH A PACKAGING COMPONENT (302) OF THE INGESTIBLE EVENT MARKER DEVICE (102,300). ADDITIONAL ASPECTS OF THE INVENTION INCLUDE SYSTEMS THAT INCLUDE THE DEVICES AND ONE OR MORE RECEIVERS, AS WELL AS METHODS OF USING THE SAME. FIG. 1A AND FIG. 1B
