Professional ear defenders. The unique digital technology of the Blaser Sport Tac by 3M reliably filters harmful noise when shooting, while essential exterior sounds remain audible or can even be amplified. This is possible thanks to the dynamic, adjustable sound attenuation, which offers insulation of up to SNR = 26 db. The Blaser Sport Tac also has an automatic shutdown function and audio input for external radios and similar devices. Both functionality and appearance are impressive: with comfortable, non-slip sealing rings, quality painted ear cups and a folding stainless steel headband, Sport Tac premium ear defenders are easily transportable, highly functional and excellently designed. The set includes 2 x 1.5 V AAA batteries, which should last for approx. 600 hours.