Optime push-to-listen ear defender.
Conforms to EN 352-1
H=33 M=29 L=21 SNR 31

• The Optime Push to Listen is an 'Electronic-Passive Ear Defender'
• Ensures that ears are never exposed to harmful noise levels.
• By simply pushing a button to listen the ear defender opens
  up so that the wearer can hear speech and warning signals.
• This means increased wearer time and greater protection and safety.
• The function will automatically shut itself off after 30 seconds
  and can be closed prior to this if required.