This Lightspeed Aviation Zulu H-Mod ANR helmet communications system is ready for us to install in your flight helmet. We can install the Lightspeed Helmet ANR system in almost any flight helmet, including HGU-55, HGU-68, HGU-56, HGU-84, SPH-4, HGU-33, HGU-26, HGU-2A/P, HGU-22, etc. The assembly comes with Lightspeed Aviation ANR earphone modules designed specifically for flight helmet use, and separate wiring branch for U-172/U microphone jack plug with grommet for helmet installation and compatible with your helmet's current boom microphone. The ear cups come with Velcro for attachment to the interior of your flight helmet. FlightHelmet.com is proud to be the first company to be authorized by Lightspeed Aviation as a Certified Helmet Installer for their new Lightspeed Helmet ANR communications system. Our installation of the Lightspeed Helmet ANR system was factory tested by Lightspeed and results met their standards for performance and comfort. Unlike other company's ANR systems, Lightspeed offers a 3-year factory warranty on the Lightspeed Helmet ANR components. The Lightspeed ANR installation is available with civilian impedance communications and a straight cord with either G/A dual plugs, U-174 single plug, or LEMO plug. The cable running from the bluetooth control module to the helmet comes standard with a quick disconnect plug for convience and safety. Military impedance is available via special order. All systems come standard with the control module which includes volume control and blue tooth device connectivity. The LEMO plug option is for panel powered ANR systems and the control module on the G/A plugs and single plug cords power the ANR system with 2 AA batteries. Lightspeed Helmet ANR systems must be installed by us, so you will need to ship your helmet to us for installation. Turn around time between receipt and return shipment is approximately one week. Note: A helmet with the Lightspeed ear cups may fit tighter than the standard ear cups since the Lightspeed Helmet ANR ear cups are thicker than the standard ear cups used in flight helmets.