The T15 is one of the most versatile in-ear monitors available offering both custom and universal fit options. The T15 comes with a broad array of interchangeable generic tips to fit any ear so you can enjoy the T15’s clarity and accuracy straight from the box, regardless of your ear shape, being assured of a snug, isolating fit every time. If you’re a user of either ER series or PRO series custom-fit earplugs you can also use the T15 as a custom-fit monitor by simply removing the filters from your earplugs and pressing the T15 in their place giving you instant custom-fit monitors which also means that you can easily upgrade your T15 to custom-fit with a set of ER or PRO series custom moulds.