Microphone: Speak voice commands into the microphone of the headset. Proper placement of the microphone is critical to the effectiveness of voice commands.

Speech: Speak naturally into the headset microphone. Articulate each word in a voice command. Do not pause between words. The system cannot recognize rapid speech or a raised voice level.

Numbers: Pronounce numbers as individual numerals. Speak the number 88 as "eight, eight" rather than "eighty-eight". Speak zeros as "zero" or "oh". Pronounce decimal points in frequency numbers as "point".