The Logitech H540 USB Headset features a lightweight, flexible headband and USB plug-and-play connectivity. It's equipped with on-ear volume and mute controls, a mute indicator light and a built-in EQ. For added convenience, the headset is compatible with both Windows and Mac OS. Plus, it works with common calling applications as well, which includes Skype, Gmail Voice and Video Chat, Yahoo! Messenger and Windows Live Messenger.