The portable CardioMessenger is an external patient device that is capable of receiving a wide spectrum of data from the range of CRTs, pacemakers, BIOTRONIKs, and ICDs. Once it receives the information, the device immediately forwards the data to the Home Monitoring Service Center using cellular networks without any assistance from the patient or healthcare provider. The CardioMessenger I/II has a small size for easy mobility as well as an integrated quad-band modern and multi-voltage transformer. These features make it ideal for unrestricted traveling in several countries.