The ECS-OHWMUSB WordMaster and the ECS-NRIE-USB WordSmith are a state of the art transcription headsets with a premium in-line built-in sound card, which bypasses computer sound cards and matches the frequency response of the spoken word, delivering superior audio quality while filtering out background noise. It is especially effective on distorted dictations with low audio. Perfect for those of you that make money on the road and at home. Many of our customers purchase the WordSmith USB because of the small size when travelling. Both headsets have incredible sound clarity and quality.