BLX Wireless Systems
For performers who wish to unplug from the wire, BLX Wireless Systems are the clearest choice. Shure delivers wireless confidence with legendary sound from industry-renown microphones, decades of wireless design proficiency and world-class construction. Available in a wide offering of bodypack and handheld configurations (including vocal, guitar, headset and presenter system), BLX Wireless Systems are ready to perform right out of the box.

Transmitters: At a Glance
Two AA batteries (included) provide up to 14 hours of continuous use
Up to 300 feet (91m) transmission radius (line of sight)
Quick and easy receiver frequency matching (GROUP and CHANNEL selection buttons)
Two-color transmitter status indicator LED:

Green: "Ready"
Rapidly Flashing Red: "Controls Locked"
Solid Red: "Battery Power Low" (less than 1 hour remaining)
Flashing Red/Power Down: "Batteries Dead" (replace batteries to repower transmitter)
TQG connection for use with Shure lavalier, headset, earset and instrument microphones and guitar cables
Tactile/easily accessible On / Off switch
Adjustable gain control
Lightweight, rugged construction
Available as bodypack (currently selected) or handheld transmitters

Receivers: At a Glance
BLX Receiver Options

BLX4 Single Channel Wireless Receiver
BLX4R Single Channel, Rack Mount Wireless Receiver (currently selected)
BLX88 Dual Channel Wireless Receiver
One-touch QuickScan frequency selection quickly locates the best open frequency (in case of interference)
Up to 12 compatible systems per frequency band (region-dependent)
Two-color audio status indicator LED:

Green: Normal audio levels
Red: Excessive audio levels (overload/clipping)
XLR and ¼" output connectors
Additional BLX4R Features:

Adjustable output level
Removable antennas for quick antenna distribution
LCD Display with detailed RF and audio metering
Rack mount kit included

Transmitter Specifications
Audio Input Level (gain) max: -16 dBV maximum
min (0 dB): +10 dBV maximum
Gain Adjustment Range 26 dB
Input Impedance 1 M?
RF Transmitter Output 10 mW, typical - varies by region
Dimensions (H x W x D) 110 mm x 64 mm x 21 mm
Weight 75 g (2.6 oz.), without batteries
Housing Molded ABS
Power Requirements 2 LR6 AA batteries, 1.5 V, alkaline
Battery Life Up to 14 hours (alkaline)

Warranty 2 years.