The network adapter kit is required for use with SAM (Smart Active Monitor) systems and GLM (Genelec Loudspeaker Manager) software. The GLM Kit (8300-601) includes a GLM network adapter body, an 8300A calibration microphone and microphone holder, a USB cable (6 feet), and a quick setup guide. Connect to your Mac or Windows PC with the included USB cable, connect to each monitor with the 5m LAN cable that comes with the SAM system.