Earmor Electronic Ear Muffs w/ Gel Earpads & AUX Input 22dB Foliage Green M31-FG PLUS. They suppress high noise levels while enhancing environmental sounds to improve awareness of voice movements and gunfire. The modular design accommodates various suspension systems and the comfortable face-sealing gel ear cushions effectively block sound and sweat making them suitable for extended wear. The M31 PLUS supports a 3.5mm AUX audio connection. Specifications for Earmor Electronic Ear Muffs w/ Gel Earpads & AUX Input: Manufacturer: Earmor Quantity: 1 Features of Earmor Electronic Ear Muffs w/ Gel Earpads & AUX Input Environmental perception Hearing Protection EMI/RFI shielding system & Dynamic Dynamic voice tracking system improves audio clarity Failsafe design for power button 5 volume levels for ambient listening and extra 3 levels for enhancing in earplug mode Package Contents: Earmor Electronic Ear Muffs w/ Gel Earpads & AUX Input Earmor M31-FG PLUS: Electronic Ear Muffs w/ Gel Earpads & AUX Input 22dB Foliage Green