The OMNITRONIC PA Volume Controller is a flush-mount mono volume attenuator for 100 V line systems. It provides 11 attenuation steps and includes a 24 V emergency priority relay. The controller has a white plastic front panel and knob, screw plug-in terminals for input and output, and an emergency input. It is rated at 5 W RMS, operates from 50 to 18,000 Hz, and measures 8 × 6.7 × 8 cm with a weight of 0.10 kg.