Portwest EP02 Corded Earplugs — NRR 32 tr-332 134 Table 1 for air-purifying Style:Non-Vented (22907) cutting the electronic Howard Leight 63406-00A

134 Table 1 for air-purifying full-face respirators

When an existing combination smoke/CO alarm reaches its service life end (typically 7–10 years depending on the CO sensor's rated life) or fails a monthly test

and for particulate alone the 7580P100 filter is enough

From the listing: hardwired power

Portwest EP02 Corded Earplugs — NRR 32 tr 332 134 Table 1 for air purifying Style:Non Vented (22907) cutting the electronic Howard Leight 63406 00A 134 Table 1 for air purifying full face respirators When an existing combination smoke CO alarm reaches its service life end (typically 7–10 years depending on the CO sensor's rated life) or fails a monthly test