The Shotwave Earbud allows you to protect your hearing and listen to low-dB sounds in a small, comfortable silicone earbud system. These buds are unique due to their analog (non-electronic) proprietary design that allows the user control of sound protection through an external push button system. When you need maximum hearing protection-you push the selector button and an audible/tactile click is heard/felt. When you need less protection (i.e. hear conversations)-you push the selector button again to switch settings.