The Apart D-VOL120 is a 70 volt volume control. It can handle up to 60 watts of power and is very durable thanks to the step-by-step attenuation in 11 steps + zero position. The D-VOL120 is designed to handle 24V priority signals. This means that you can always get an announcement out, even to zones where the local volume control is in the ‘OFF’ position! If your amplifier has a 24V priority output, it will send a 24V signal when you push the talk button on the microphone. The 24V signal will close a relay on the D-VOL120 volume control, and the signal will pass, even when the volume control is in the ‘OFF’ position. This can be very useful for emergency or evacuation messages. The D-VOL120 is built on a universal chassis that easily can be integrated with any Decora box offering a flush mount and neat finish.