Hi Michael,
The ear pieces are full size covering the whole ear keeping out room noise 
very well.
The mike cartrages are switched by a small switch on the boom.
I really like the set.
I hope I answered your questions.
Best 73.
Lowell  W8QIY
----- Original Message ----- 
From: "Michael Ryan" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, June 04, 2012 12:03 PM
Subject: Re heil pro micro duel


> Hi Lowel:
>
> Do you have to switch the cartridges manually? How big are the ear pieces? 
> I'm thinking they're the size of the really small so called over the ear 
> type. You know like the walkman headphones.
>
> TNX & 73:
> Michael DE VO1AX
>
> Sent from my iPhone
>
>
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