Skype-certified Logitech H540 High-Performance USB Headset for Mac and Windows: Featuring on-ear controls and high-definition audio HIGH-END AUDIO FOR MUSIC AND CALLS Precision audio is achieved with laser-tuned drivers and an integrated equalizer. Rich, digital stereo sound is instantly available for calls, movies, and music thanks to USB plug-and-play connectivity. Mute indicator lights and on-ear controls make