When workers lift their muffs, they lower their protection. Now 3M™ Peltor™ puts safe listening at their fingertips. Just push the button on the PTL™ muff and speach & sounds "outside" the muff cup can be heard "inside" - clearly and safely. After 30 seconds, the muff automatically returns to its full protection with an NRR of up to 26 dB. Listen again? Just push again. It's that simple. And listen to this: The PTL™ muff is affordable. In fact it doesn't cost more than many standard, non-electric models. The PTL™ Earmuff from 3M™ Peltor™. Listening when it's wanted. Protection when it's needed.