Key Features: The system features Shure's patented Audio Reference Companding technology for enhanced sound clarity.System Varieties: These professional-grade microphones are commonly sold in different configurations, such as 2-in-1, 4-in-1, and even 8-in-1 sets to accommodate various performance needs.Performance: The GLXD series is noted for stable signal transmission with dual antennas and is suitable for churches, karaoke, and stage performances.