The Peltor ProTac Hunter Ear Defenders are highly technical, level-dependent hearing protection that are extremely comfortable. These ear defenders come with a wide range of features including five volume level steps, 3.5mm listen only jack, large user-friendly buttons, dual shell design all contained within a stainless steel headband and powered by 2 x AA batteries to give approx 100 hours of use. There is an automatic power shut off mode after a period of inactivity. Hunter model with slimline cups SNR =26dB.