The T-8000B remote control with audio input module is connected with T-8000 through universal industrial standard CAT 5 for each eight zone' s volume adjustment or remote line and microphone input at a remote and different location from the control center. Each controller provides eight RJ45 ports for the remote control with audio input module. The CAT 5 wiring is not only featured of cost-effective, convenient layout, but also integration of RS 485 communication, audio transmission and DC 24V power supply together. This module family also has simpler functional module of T-8000C and T-8000D. Remote line by dual RCA and mic by XLR inputs with gain controls. Zone LED indicator with up/down buttons. Volume control is provided for overall output level control. DC 24V power supply from controller, low power consumption 5W. Analog to digital conversion working principle to adjust controller' s volume.