Earmuffs with built-in automatic sound-isolating speaker TAE-80 1 piece

When you turn the volume knob on, you can hear sound from the built-in speaker, so you can have a smooth conversation even while wearing the headphones. If the speaker is turned on and detects noise of 80dB or more, it will automatically turn off so that the functionality of the earmuffs is not impaired. Width (mm): 140 - Height (mm): 175 NRR rating (dB): 22 ANSI (American National Standards Institute) certified product Usage time (approximate): 2 AA batteries (sold separately) Manganese: 250 hours Alkaline: 600 hours Material/Finish: Earmuffs: ABS resin, polyvinyl chloride (PVC), Band: Polyvinyl chloride (PVC), Polyacetal (POM) Note: Batteries sold separately. If you will not be using the product for a long period of time, remove the batteries (to prevent battery leakage). Country of Origin: Taiwan Code number: 278-5633