[. . . ] Purpose for use The communication system AE 600 has been designed for speech communication between motorbike driver and passenger. To achieve this you use the supplied helmet speaker sets OHS 500 which have to be fitted into already existing closed or open helmets (the microphone with it's thin and flexible boom can be installed at both kinds of helmets). As optional solution, also a version with velcro-type microphone (CHS300), only for closed helmets, is available. [. . . ] On a metal plate at the handle bars may remove the velcro tape and stick the talk button with adhesive pads directly to the desired location. Please fix the ear sets with still a small gap between the ears and the helmet. Your ears should not be completely covered by the ear set because then you might not be able to listen to the surrounding noise of traffic (due to Road Traffic Act you may not use headsets that completely cover your ears because you might overhear honking or other signals). Please do not carry out any technical modifications at the helmet before installing the headset. The ECE standard for motorbike helmets does not permit to flatten the material inside the helmet i. Fix the microphone so, that it is always close to your mouth with the supplied adhesive pad. Before fixing the adhesive pads thoroughly clean the desired location (i. Press tightly and remember that it takes several hours until the final strength has been achieved. The basic installation is very simple- just plug in the 2 headphones (2), and that's it!Where to locate the central unit The best place for location of the central unit is inside or close to the tank knap sack or in the outside-pocket of your biker-suit. Power supply / Inserting of batteries Open the battery lid at the bottom of the central unit. warning: Never use batteries and rechargeable batteries mixed in the battery compartment. Only use batteries or rechargeable batteries of the same kind, and never mix full and empty batteries. Dispose of used batteries only at the authorized collecting points at special dealers. Pay attention to the different containers for batteries and rechargeable batteries. Batteries and rechargeable batteries are special waste, they may not be disposed of with household garbage. [. . . ] The audio output of the navigator or Music player is mixed to the headphone audio of driver and passenger and can be adjusted by the VOLUME potentiometer (4) on the left side of the unit. Electronic Waste Disposal: If you should not need the Intercom any more or if it should become defective and cannot be repaired, the new European WEEE directive does not allow any more to dispose it via your household trash bin. Please dispose electronic items only at the local electronic waste collecting stations, and remove batteries before disposal. [. . . ]