Andrea NC-121
Noise canceling monaural headset microphone for dictation. Informational websites:    http://www.andreaelectronics.com

Insync Buddy
Stub microphone for use with handheld recorders.  Stubby microphones give better sound quality, and so better recognition, than the internal microphones in portable, digital voice recorders. Informational website: http://www.speechtechnology.com 

Shure TCHS Wireless Microphone
Wireless system that includes a head worn microphone,  receiver, computer cable and power supply. Informational website: http://www.speechtechnology.com