Epson ELPCB04 is a wall-mountable projector control box designed to simplify AV management in classrooms, meeting rooms, and collaboration spaces. It consolidates common inputs and controls into a single, easy-to-access interface so users can switch sources, adjust volume, and mute audio or video without reaching the projector. The control box includes wired interfaces such as USB-C and RS-232 and offers HDMI control buttons and dual USB outlets to support a range of connected devices.