Adastra: 952.470UK, 100V Volume Control, 50W, Relay Fitted, Surface Mount, ABS FaceplateEnhance your audio system with the 100V Volume Control Relay Fitted. This high quality attenuator includes a plastic surface mount back box and a stylish ABS faceplate with a matching knob. It features a 24V relay for remote bypass to full volume, triggered from a fire alarm panel, ensuring safety and quality. Attenuation in 10 steps: 8 x 3dB and 2 x 6dB steps for precise control. Robust construction with a 24V relay to allow remote attenuator bypass.