Product descriptionSize:Female AdapterProduct Details:* Condition: * Material: Plastic* Compatible: German cars like Mercedes-benz and others.User Instruction:* If you meet the faults of and navigation syst, don't work, navigation is often broken and always blank screen, it may be caused by damage of the telephone module.* Please find the optical fiber head of telephone module and pull it out, and connect optical fiber loop to cancel the phone function, so that can resume work.* The modules connected on a vehicle M.O.S.T ring include: Changer, Video Display, Navigation, Mobile Phone, Bluetooth-compatibletooth, Voice Recognition, Amplifier and Dial/FM/AM .* If you wish to remove one of these modules from the fiber optic ring for repair or fault diagnosis you will require this female Tyco (TE) connector / adapter and fiber optic bypa loop cable to close the M.O.S.T ring and maintain the integrity of the remaining modules on the ring.* It can also be used to diagnose faults by systematically removing modules from the ring and inserting this adapter loop to bypa the module.Package Includes:1pc Optic Loop Bypa Female Adapter