With the Philips PRO6105, you can listen to a detailed version of your favorite songs. The earbuds support Hi-res audio. This allows you to play lossless files. These files are larger than the standard MP3 format, so you get to hear more detail in music. Receiving a call while listening to music? If so, you can answer the incoming call with the special button in the cable. You can make hands-free phone calls via the integrated microphone. The earbuds include earbud sizes S, M, and L by default.