Phonak Roger Covert System Gebrauchsanweisung Seite 19

4.8 How to wear the microphone
The MM11 should be worn approximately 15 cm / 6 inches from the
mouth, and oriented towards the mouth.
Do not cover microphone with multiple layers of clothes. Waterproof
i
clothes will drastically reduce audio pick-up.
15 cm
6 inch
19