Please provide information about the two-way radio microphone model 559853, made by Shure for RCA.
This is an OEM model. Please read this link: Shure OEM Products: 1940s to 1990s
The model 559853 is likely a variation of the Shure standard model 550. To view 550 User Guides, use this link: http://www.shure.com/americas/support/user-guides/discontinued-products