Headband option. The PeltorTM OptimeTM Push To Listen Ear Muff means no more cup lifting, it is an "Electronicpassive" muff - which has one passive side and one electronic side. Simply push the button to listen, opening up the ear defender for communication. The electronic function automatically shuts off after 30 seconds and can be manually adjusted to close earlier if needed. Hearing Protection Style Standard Headband Attenuation Rating (SNR) 31dB Protection Level 94dB(A) - 105dB(A) Hearing Protection Type Passive Earmuff Working Environment General Industrial Use Basic need for communication Continuous / Long exposure to noise Dirty/dusty environment Intermittent / Short exposure to noise Presence / Handling of contaminants