Specifications:

Shure SM Wireless Microphones deliver an unparalleled mix of audio quality and rugged dependability that has made them the industry standard in professional sound. They are built to withstand the rigors of regular stage and studio use. All microphoneapplications are covered with Analogue and Digital Wireless Receivers. The Analogue Wireless Receiver provides improved linearity and frequency response for up to 12 compatible channels per group with group and channel scan for easy set-up.  

BLX4 Receiver features: 

• Up to 12 compatible systems 
• Microprocessor-controlled internal antenna diversity 
• One touch QuickScan locates the best open frequency 
• 1/4Ë and XLR audio outputs 
• Two color audio status indicator LED 

BLX2 58-Handheld Transmitter features: 

• Power and battery status LED 
• Adjustable gain control 
• Quick and easy frequency matching 
• AA batteries (included) provide up to 14 hours of continuous use 
• 300 ft. (100 m) operating range (line of sight) 

Set consisting of: 

• 1 x BLX4 Receiver 
• 1 x BLX2 SM58-Handheld Transmitter