USB Boundary Microphone with Color-Changing LED Base. Modernize the look and feel of your conference room, huddle space or gaming rig with the MXL AC-404 LED. High performance 3-capsule microphone design captures crystal clear speech intelligibility. Personalize the AC-404-LED's glowing base with 8 preset color modes to match your computer equipment, logo, or room decor. The AC-404-LED easily connects via USB for web conferencing, gaming, and more.