Advanced Digital Circuit ACTIVE DYNAMIC SOUND SUPPRESSION HI GAIN OMNI DIRECTIONAL MICS As its name implies, the Razor PRO Digital ear muffs utilize advanced digital circuity to provide enhanced clarity of desirable ambient sounds*such as voice, high-frequency steel impact, and environmental sounds like animal movement.table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }