How it features the TableMike ?…

Exclusive Variable Long-Range Self Adjusting Input (“SpeechMatic”)

Please check this comparative table in horizontal mode only.
SPECIFICATIONS
ALL TableMikes
Operating System
Windows® 8 / 7 / Vista® / XP® / 2000 / MacOS® X / most Linux versions without special USB Sound drivers (Plug & Play)
Compatible voice applications
DigaLaw®, QuickTypist®, Dragon NaturallySpeaking®, Microsoft Speech for Windows®,ViaVoice®, Skype®, etc.
Capsule type
Back Electret Condenser with Cardioid Polar Pattern
Control Panel
Digital buttons to avoid unwanted noise ‘clicks’, of which the Volume ones are user programmable (with the TableMike Config™ software)
Push Button modes Configurable
Always On / Press to Lock / Press to Talk
Sensitivity
-37 dB@1kHz, SPL=1Pa
ADC sample resolution and rates
16 bit mono and up to an exceptional 48 kHz for both Recording and Playback (maximum of 22 kHz for the best competing devices!)
ADC SNR
An exceptional 92 dB@i fs=48kHz, 1kHz at 1 Pa
ADC THD
An exceptional 0.003% @ fs=48kHz, 1kHz at 1 Pa
Frequency response and Output Impedance
80 – 20,000 Hz and 1700 ohms
Sound ports
Standard 3.5 mm mono mic-in and 3.5 mm stereo out with 3 Watts
Power supply
From the USB port of the PC (no need for batteries!)
Other unique features
‘Speech Equaliser (EQ)’ and ‘Automatic Gain Control (AGC)’ or Amplifier, to automatically increase the volume while the user moves away of the microphone. High and Low Pass filters, Digital Signal Process (DSP)
Variable dictation distance
From a minimum of 10 cm up to 50 cm (4″-20″) and more, depending on your voice
and ambient noise. Optimal distance 25 cm or 10″ under Green LED