Features premium WL185 lavalier microphone, SM58 handheld vocal microphone and GLXD4R rack mount receiver. The GLX-D Advanced suite of products automatically scans, coordinates, deploys and updates wireless receivers and transmitters during setup and use.This means the freedom to focus on your message, lesson or performance-not the technology delivering it.It's easy to install multiple rack mount receiver systems using the included mounting hardware and detachable antennas, then optimize for your space with additional accessories. Intelligent rechargeable transmitters clearly display charge status and offer a variety of charging options.With GLX-D Advanced, you don't have to be an RF engineer to seamlessly run wireless sound.