OK, I got the answer : CR2032. SUN part number was unreadable, but it
is 370-1414...
 Sorry for the inconvenience.     Paul

On Mon, Sep 14, 2009 at 3:22 PM, Paul Bartholdi <Paul.Bartholdi at unige.ch> 
wrote:
> Hello,
>
> As it happens, I have 8 of these microphones in front of me for an
> experiment, but all batteries are missing...
> Does any one knows which type of batteries they use? and possibly how
> long they will last? I can't find any reference in SUN docs.
> Thanks for any indication, ? ? regards, ? ? Paul
>
> On Sun, Sep 13, 2009 at 6:20 PM, a b <tripivceta at hotmail.com> wrote:
>>> At one company we had about 20 of those microphones and some of you
>>> might even remember the speakers. They were never used...
>>>
>>> Here's a pic of the microphone
>>> http://www.security-lab.de/pics/sun-mic-1.JPG.

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