Optime III are high performance hearing protectors that has been developed for use in extremely noisy environments. Features and Benefits Provide effective protection and high levels of comfort for the wearer Double casing technology minimises resonance High level of attenuation Clip-on version compatible with several brands Typical Applications Airport Marine engine room Mining Power station Notes Available in hi-vis green for workers who need to be extra visible. H540A - Headband: SNR=35dB, H=40dB, M=32dB, L=23dB H540B - Neckband: SNR=35dB, H=40dB, M=32dB, L=23dB H540P3 - Helmet Attachment: SNR=34dB, H=40dB, M=32dB, L=22dB