I use the DSP-400 from Plantronics based on a recommendation for Dragon NaturallySpeaking dictation software (voice recognition). The voice recognition is excellent! The headset wears really very pleasant, so that you would barely notice (were it not for the cable). Since I travel a lot, I use the foldable version of the DSP-400th Unfortunately no suitable container is, so you have to find something even to protect the part from transport damage. Nevertheless, I give 5 points, since the main purpose of speech recognition "is perfectly met.