The Flexx Pro features our soft, flexible shells that gives you a higher NRR (29db), and a more comfortable fit than standard acryllic shells. This unit also features a 12 band digital compression circuit that has an automatic background noise filter to keep wind, crowd noise, and road noise suppressed while making speech and game more audible. The automatic feedback canceller means you can turn the volume as loud as you want with no whistling. The compression cirucuit suppresses all sound over 90db to keep your ears safe. This means you still hear the sound, but it's at a safe, comfortable level. This gives you a much smoother sound than traditional clipping circuits that just momentarily shut off when sounds reached 90db. The Flexx Pro features independent volume controls AND a pushbutton control that gives you four different listening programs to choose from. Each program gets progressively higher pitched so if you have hearing loss, you can choose which program sounds the most natural to you. This will allow you to hear game like never before in any situation.