I bought this because the specs suggested it would meet my need for something cheap to connect my PC headset to my Mac, but the microphone input doesn't work. As others have noted the input bar lights up halfway on the Mac sound preferences, but there is no response from the mic on a PC headset plugged into this thing. It simply doesn't work as a USB device to accept input from a Sennheiser PC 151 headset, and presumably lots of other headsets that people use with PCs and want to use with a Mac. Sorry, but this product should be withdrawn. It's so cheap it's not worth the shipping to send it back, but my advice is to spend a few more bucks and get something with reviews that say the product works with a Mac if you're looking for something to use with your Mac.