The UM300B has been discontinued.
It has been replaced by the UM500.

Operating instructions and other reference manuals are still available or downloading. (Click here.)

If you cannot locate the reference material you need, or if you have further questions, please contact Lectrosonics Sales Department at:

E-mail:  sales@lectrosonics.com
Phone: 505-892-4501, or 800-8231-1121
Fax:      505-892-6243