Subminiature lavalier microphone provides all-purpose, rugged performance with an easy-to-conceal, 2.5 mm. construction. It features low distortion at high SPL, selectable HF response caps, superb off-axis rejection, and colors to match skin tones. Subminiature lavalier microphone provides all-purpose, rugged performance with an easy-to-conceal, 2.5 mm. construction. It features low distortion at high SPL, selectable HF response caps, superb off-axis rejection, and colors to match skin tones.