Check the listing for details. Universal Audio Volt-276 Bus-Powered USB Audio Interface. Condition: Open box, Made in China. Listed at 239.99 USD. The Universal Audio Volt-276 Bus-Powered USB Audio Interface is a high-quality audio interface designed for musicians and producers. With 2 microphone inputs and 2 line inputs, this interface allows for easy connection of various audio sources. Its bus-powered feature eliminates the need for external power sources, making it convenient for use in different recording environments. The model Volt 276 by Universal Audio is known for its reliability and compatibility with a wide range of audio equipment, making it a great choice for professionals in the music industry.