E99 headset which has a "round ball" sponge ON the ear piece,(not over). This is a replacement headset that can be used with the T1000. A headset that's perfect for use with a transcribing machine, the E-99 is standard equipment inside all Olympus transcribers. When using with a Pearlcorder Microcassette recorder, please purchase the PA-1 plug adapter. For sanitary reasons headsets are not returnable once they have been used. Warranty replacement only.