The SP-5000 has an integrated circuit which decodes audio received via USB (Universal Serial Bus) & sends the analog audio signal to an installed Techconnect amplifier or an external amplifier. Simply route the USB (Universal Serial Bus) from the PC to the loudspeakers. The PC will recognize them as an audio output device. An attractive curved chassis & grille compliment the finish of an interactive whiteboard or flat panel installation. When connecting USB (Universal Serial Bus) to an interactive whiteboard the decoder must be powered. Power can be shared with a Techconnect Amplifier power supply if installed.