Cardioid Condenser Low Profile Boundary Microphone

Cardioid Condenser Low Profile Boundary Microphone with Integrated Wireless Transmitter, Programmable Mute, Bi-Color Status Indicator. Requires SLX4 or SLX4L Receiver
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Shure Incorporated
Mac & Win
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Availability: In stock

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

Working Range

Line of Sight

30 m (100 ft)

Frequency Stability

10 ppm


FM45 kHz max. deviation

Power Requirements

2 LR6 AA batteries, 1.5 Valkaline

Power Consumption

@3 V

Display backlight on220 mA, 30 mA
Display backlight off175 mA, 30 mA

Power Consumption (X4, X7)

@3 V

Display backlight on245 mA, 30 mA
Display backlight off200 mA, 30 mA

Battery Life

>8 hours (alkaline)

Operating Temperature Range

-18C (0F) to +57C (135F)


43 mm x 87 mm x 148 mm (H x W x D)


Net319 g (11.2 oz.)312 g (11 oz.)
Packaged516 g (18.2 oz.)530 g (18.7 oz.)

Frequency Selection

Shure offers wireless systems in a selection of bands that conform to the different government regulations of specific nations or geographic regions. These regulations help limit radio frequency (RF) interference among different wireless devices and prevent interference with local public communications channels, such as television and emergency broadcasts.

The system's band and frequency range are identified on the receiver and transmitter. For example, "H4 518-578 MHz."

For information on bands available in your area, consult your local dealer or phone Shure. More information is also available at

Frequency Range

BandFrequency Range ( MHz )
G4470 to 494
G5494 to 518
H5518 to 542
H19542 to 572
H62518 to 530
J3572 to 596
L4638 to 662
P4702 to 726
Q4740 to 752
R13794 to 806
R5800 to 820
JB806 to 810
S6838 to 865
X4925 to 932
X7925 to 937.5

Note: Frequency bands might not be available for sale or authorized for use in all countries or regions.


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