Rockford Fosgate M2 1" Marine Add-On Tweeter KitM2 1" Marine Add On Tweeter Kit M2 TS The M2 TS 1" tweeter kit increases system overall sonic performance by adding to your existing M2 Color Optix full range speakers. The tweeter is protected with a stainless steel mesh grille and can be installed using a flush or horn mount bezel. The Element Ready design and IP67 certification makes them truly purpose built for marine or motorsport applications where protection from damaging UV rays and water