By blocking out loud, harmful noises at any moment while simultaneously enhancing environmental sounds and voices, Savior Equipment's Apollo Electronic Sound Suppressors provide excellent audio quality along with a noise reduction rating of 24dB.FeaturesPassive Sound Dampening - 24dB NRRActive Electronic Sound CompressionCompact Collapsible DesignPadded Mesh Handband w/ Adjustable Wire FrameStainless Steel Microphone Mesh CoveringDual Omnidirectional MicrophonesHigh Dynamic Range SpeakersFrequency-Tuned Drivers w/ Enhanced Black PCBSize collapsed: 5.5" x 5.5" x 4" IncludesAdaptive Cool Gel Ear Pads1x American Flag Patch1x Savior Writable ID Patch2x AAA Energizer Batteries