3M™ M 448 Duurzame schouderbedekking Scotch Brite™ Recommended application Welding Assembly Demolition Recommended application Welding Assembly Demolition Workplace maintenance Grinding Sanding Bluetooth No Communication via external two way radio No Noise reduction value 33 dB Noise reduction value (HML) H=35 M=32 L=24 Noise reduction value (SNR) 33 dB Dielectric No Electrically insulated No External audio input No Hearing protection type Helmet mount Earcap style Safety helmet mount Noise canceling headsets Yes Quantity per box 10 Shelf life in days 1825 Days Built in FM AM radio receiver No Built in two way radio No Smallest sellable unit* Piece Brand PELTOR™ Product color hi viz Product series Optime Product type Earcap Meets specifications CE Approved EN 352 3:2020 Close Arrow Up Icon Recommended application Pharmaceutical production Powder handling Paint spraying Assembly and mechanical General maintenance Battery type Lithium ion Protection TH2 TH3 depending on hood type Protection type Particulate Attachment type Belt attachment Quantity per box 1 Shelf life in days 1825 Days Intrinsically safe No Smallest sellable unit* Overbox Battery life 4 Product color: Black Shelf life in days: 1825