Philips SMP3800 SpeechMike Premium Touch Precision USB Microphone with Integrated Barcode Scanner - Push Button Operation Free floating microphone  best in class recording quality for highest SR accuracy. Ergonomically shaped backside  perfectly fits the human hand Front keypad design with 3 dictation zones' and clickable dynamic touch sensor. Fully configurable keypad wtih (4) programmable function keys amd additional "Instruction" button. Button layout designed around proven ergonomic findings  for comfortable dictation