Lewitt B70AS Analog Base for Conference Microphones with SwitchLewitt B70AS Analog Base for Conference Microphones with Switch The modern shapes efficiently minimize structure borne noise. The material is rugged and features a non reflective matte black coating. Our bases have a 3 pin XLR connector and a balanced 3 pin XLR output connector. Key Features Dampens structure borne noise Mute button with clear visual feedback Sturdy and reliable zinc die cast housing 48 V phantom power 3 pin XLR connector