An external microphone is not strictly required, however for the best accuracy and dictation quality, especially in noisy environments, we recommend a good-quality unidirectional microphone.
Our number one recommendation is the Philips Speechmike Premium Touch SMP3700. This mic is far and away the best option we’ve come across for dictation. Not only does it have terrific noise-canceling capabilities, but it also has the ability to program hotkeys to enable you to do even more with Talkatoo. You can program a button to start and stop dictation, to jump to a new line, or anything else you can think of. Read this helpdesk article to learn how to easily configure your SpeechMike with Talkatoo.