This MP555 was voted "Most Comfortable Headset" by transcriptionists online 3 years in a row. It has 2 special features that make it unique. The first is a switch to go from mono to stereo. This lets you use it on a transcriber in the morning and a computer at night.
The Next item is a convenient volume switch on the headset, so you can customize the sound without having to touch the transcriber. It also gives you a 30% volume boost on top of your normal computer or transcribers volume control.