The Gold Series Advantage is the balance achieved between comfort, noise attenuation and purity of sound. No compromises or excuses. Key features include a medium sized cup for easier shouldering of long guns while providing strong NRR protection of 28. Ideally suited for handguns, pistols, rifles and shotguns use. The lighter weight makes this more appropriate for women in a high noise environment. There is an auto shutoff feature after 4 hours of inactivity, a 1.5 millisecond attack time, also called response time. Inputs for Apple iPod, CD, motor sports scanner or radio compatible using a 3.5 mm mini jack. Enjoy high fidelity sound while protecting your hearing.