I-listen is the most frustrating piece of soft-ware I bought in years. The documentation is insufficient and the program does not perform well at all. It produces garbled sentences and the correction function is impossible to use. To compare, I read the same sentences to a free web-based program that converts to email voice notes that you leave via your cell phone. This latter program had a 100% accuracy, I-listen produced only word salad. Stay away from I-listen.