The Shure GLX-D14+ dual-band wireless headset system features the durable SM35 headset microphone for high-quality vocal performance applications and the GLXD4+ tabletop receiver. It combines the leading edge of automatic frequency management technology with best-in-class intelligent lithium-ion battery rechargeability, world-renowned microphones and new dual-band (2.4GHz and 5.8GHz) wireless frequency capability. The revolutionary GLX-D+ wireless systems define the standard for seamless ease of operation and exceptional digital audio clarity.