Incorporate active noise reduction (ANR) into your headset or helmet with this ANR module system. The modules come pre-assembled and consist of 2 units which install into the earcups. Also included is a 9V battery case and all the necessary cables. Designed to fit in most headsets and helmets with large dome earcups. Modules are also available for the Peltor 7000 series. The system is fitted by our headset technician and due to the nature of this product we must ask you to contact us by telephone to purchase it.