3M PELTOR ProTac III Noise Control Earmuffs Slim MT13H220A 1 piece/box MT13H220A 1 piece

Catalog number: MT13H220A Features: ●Noise-control earmuffs that control the sounds heard inside according to the external noise level. ●Easy to talk with even while wearing them, and you can hear external sounds, so they are very safe. ●When the noise level is low, you can hear external sounds through the built-in microphone, and when the noise level increases, your hearing can be protected just like with regular earmuffs. ●Connects to a radio or cell phone to enable voice communication, and automatically controls the sounds heard inside according to the external noise level. (Connection cord sold separately) ●Comes with a 3.5mm jack, so you can connect to a radio or cell phone to hear audio. (Cord sold separately) Uses: ●For noisy work. Specifications: Width (mm): 140 Height (mm): 210 NRR value (dB): 21 Noise reduction performance based on ANSI S3.19-1974 Headband style Power supply: 2 AA batteries (included for testing) Low power warning function Automatic power off function (power off after 4 hours of non-use) Materials/Finish: Earmuffs: Polyurethane, PVC Band: Stainless steel, PVC, Polyamide