Shure GLXD14R+/SM31 Dual Band Pro Digital Wireless Microphone System for Fitness, Aerobics - 12-Hour Battery Life, 100 ft Range | SM31FH Fitness Headset Mic, Single Channel Rack Mount Receiver
Shure GLXD14+/SM31 Dual Band Pro Digital Wireless Microphone System for Fitness, Aerobics - 12-Hour Battery Life, 100 ft Range | SM31FH Fitness Headset Mic, Single Channel Receiver