The MX54 Pro-Mix mixes three microphones into a transformer balanced output. It has three XLR inputs, each with individually switchable phantom power, and Low Cut switches, a Level control. As mentioned, it has a transformer balanced, XLR output. A 1/4 inch Aux/Headphone output has been provided along with a Clip indicator, Power indicator, and Power switch. The unit is also powered by two 9-Volt alkaline batteries.