In article ,
says...

it is a headset walkie talkie with product number, 3-5947b
i am not sure of how old it is, i acquired it garage saling with my
sister...
i do not understand how i talk to someone else on it, there is no
button and when i talk straight into it, it doesnt do anything...

This may seem a bit obvious, but... Assuming this is indeed some
sort of short-range consumer communications device (along the lines of a
no-license-required kid's 'walkie-talkie'), you would need a matching
unit for it to talk to.

In other words, you would need a similar unit on the same
frequency as the existing one. A radio signal does no good if there's
nothing around to receive it.

Happy hunting.
--
Dr. Anton T. Squeegee, Director, Dutch Surrealist Plumbing Institute.
(Known to some as Bruce Lane, ARS KC7GR,
kyrrin (a/t) bluefeathertech[d=o=t]calm -- www.bluefeathertech.com
"If Salvador Dali had owned a computer, would it have been equipped
with surreal ports?"