The Peltor noise attenuating HEARPLUG, a listen-only earpiece, increases the efficiency of radios used in high noise areas. It boasts: 3.5mm MONO PLUG, 8" Curly Cable, Dynamic 200 ohm noise cancelling boom microphone, Earphones 2x220 ohms wired parallel (110), Almond color earplug for discrete applications. * Requires in-line PTT cable Minimum Purchase Qty:1 Pk