Product Details


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.



  • 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
Microphone Type
Polar Pattern
Frequency Response
Form Factor
Model Line

Available Options

MX690=-G4 Operates in the G4 frequency band
MX690=-G5 Operates in the G5 frequency band
MX690=-H19 Operates in the H19 frequency band
MX690=-H5 Operates in the H5 frequency band
MX690=-J3 Operates in the J3 frequency band

Available Bands

G4 (470.125 – 493.825 MHz)  
G5 (494.125 – 517.750 MHz)  
H5 (518.200 – 541.800 MHz)  
J3 (572.200 – 595.800 MHz)  
L4 (638.200 – 661.800 MHz)


Which Band Should I Choose?

Find out which band for the MX690 has the most available wireless channels in your location. Already own the MX690? Use the Wireless Frequency Finder Tool to find frequencies.

Type Condenser (electret bias)
Frequency Response 50–17000 Hz
Polar Pattern Cardioid

Additional specifications are available in the user guide.

Software & Downloads


File Language Type File Size
Microflex Microphones Product Brochure English PDF 1.6 mb

CAD Drawings

File Language Type File Size
MX690 CAD Drawing English ZIP 114 kb

Specification Sheets

File Language Type File Size
MX690 MX890 Specification Sheet English PDF 326 kb

User Guides

File Language Type File Size
MX690 MX890 User Guide

Product Support

Find Wireless Channels for Your System

The Wireless Frequency Finder tool provides recommended channels for all Shure wireless systems.

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