Converts unbalanced 3.5mm TRS stereo to balanced XLR mono signal for professional audio use. Balanced XLR output provides clean audio transmission with minimal interference. Adjustable output volume knob and ground-lift switch ensure clear, noise-free sound. Passive design requires no battery or external power supply for reliable operation. Compact, durable aluminum construction (4.25 x 1.1 x 0.9 in, 4.1 oz) for portability.