What if you could adjust the volume of life?

With Knops, you can turn up or turn down the volume of your surroundings. The plug has four different steps with accompanying sound levels. When you adjust to the first level, you will hear what you would've heard without the plugs. On the second level, you would reduce the volume to filter the noise of a vibrant city. On the third, you will adjust the volume to a live music setting and the last level will create a silent environmental ideal for concentrating on the task at hand.

Overall, Knops is aesthetic and fresh as I'm not aware of anything like it. Although, regular earplugs can tone down the decibels, its often ugly and does not give you the option to adjust the volume. What else is out there that you wish was more aesthetically pleasing?