Abstract: The present invention relates to systems and methods for training, testing and/or certifying one or more subjects (e.g., at the same time (e.g., in the use of an automated external defibrillator (AED) and/or cardiopulmonary resuscitation (CPR))). In particular, the present invention relates to remote bi-directional communications (e.g., data delivery, acquisition, and/or maintenance). For example, the present invention provides communication between a handheld AED simulation device (e.g., comprising a processor) and one or more simulation devices (e.g., a mannequin (e.g., comprising a processor and/or one or more sensors) connected thereto and/or components (e.g., controls and/or sensors) associated therewith. The present invention also provides a system configured to relay information (e.g., instructions and/or performance data) between one or more processors (e.g., housed on a personal computer or other device) and one or more additional processors (e.g., housed on a simulation device (e.g.