The Microflex® Wireless Boundary Microphone offers total freedom of placement with no holes to drill or cables to run for installation.

The Wireless Boundary Microphone is the perfect solution for conference and meeting spaces where users demand flexibility and high performance. Compatible with Shure SLX® Wireless Systems.




Microphone Type


Lightweight, sensitive diaphragm. Precisely and smoothly captures sound nuances. Powered by battery or phantom power supply.

Polar Pattern


Picks up the most sound in front of the microphone and some from the sides. Less susceptible to feedback in high volume environments.

Frequency Response
Form Factor


Model Line


Microflex Microphones Product Brochure (PDF)
MX690 MX890 Specification Sheet (PDF)
Microflex Microphones Product Brochure
MX690 CAD Drawing
MX690 MX890 Specification Sheet
MX690 MX890 User Guide
Related Links
CAD Drawing (.zip)
FAQ's for MX690
CommShield® Technology White Paper
SLX Wireless Systems
  • Sleek, low profile design
  • Frequency agile, microprocessor controlled transmitter
  • Bi-color status indicator
  • IR link to SLX receiver for automatic frequency synchronization
  • Programmable mute function
  • Battery level indicator
  • Operates on two AA batteries
  • Logic output for remote LED and mute control
  • CommShield Technology for improved RF filtering
Condenser (electret bias)
Frequency Response
50–17000 Hz
Polar Pattern
User Guides
File Language Type File Size
MX690 MX890 User Guide English PDF 744 kb
MX690 MX890 User Guide French PDF 746 kb
MX690 MX890 User Guide Portuguese PDF 748 kb
MX690 MX890 User Guide Spanish PDF 746 kb