The Extron WPB 103B wall plate is specifically designed for a standard one gang-sized junction box. It features popular A/V configurations using pass-through connectors as well as active audio buffering for an affordable integration solution. It accepts line level stereo audio input signals and outputs them as balanced or unbalanced audio. It also buffers and balances audio signals for long cable runs. The Extron WPB 103B wall plate is made of metal and is available in black or white finish. An external international power supply is included (part # 70-055-01). Mounting brackets, junction boxes, and mud rings sold separately.