Loop Switch 2 Review: A Volume-Adjustable Earplug Solution for Noise Reduction

The Loop Switch 2 is a new earplug design that offers three volume options, allowing users to adjust the level of noise reduction according to their preferences. With a mechanism built into the loop portion of the earplug, users can rotate the loop forward or backward to reduce or block out sound.

Source: https://www.wired.com/review/loop-switch-2/