Ya'll check these out. They look neat and the docs and software are available on the manuf. Website. http://cgi.ebay.com/NEW-OrbComm-Stellar-ST-2500-ST2500-Data-Communicator_W0Q QitemZ150216315996QQihZ005QQcategoryZ4674QQssPageNameZWDVWQQrdZ1QQcmdZViewIt em 73, Walter K4HV