AO Safety(r) Hearing Protector (90561)

Advantageous for hearing impaired workers in moderate noise levels. Suited for individuals who have a critical need to hear machinery and/or verbal communications. No electronics, batteries or delicate microphones. Patented system responds to high level (+120dB) noise impulses with increased attenuation, allows normal communications to be heard. Also available in cap attached version, Ultra9000H. Laboratory tested NRR 16dB Class B.