Earmor Y Harness for M31 Ear Pro Headsets Black. 5mm female mic input connector and 3.5mm male headset audio input lead. This setup allows you to integrate comms into your non-comms M31 Mod3 Mod4 Mark3 Mark4 & Plus hearing protection headsets by Earmor. This Y Harness still requires an Earmor Boom Mic and Push To Talk to tie in radio. Specifications for Earmor Y Harness for M31 Ear Pro Headsets: Manufacturer: Earmor Color: Tactical Black Features of Earmor Y Harness for M31 Ear Pro Headsets 21'' Total Length NATO Wired Designed for Left Side Mount(MOD4 Capable of Right Side Mounting) Designed for Earmor M31 Ear Pro Only Not Compatible with Any Other Ear Pro Package Contents: Earmor Y Harness for M31 Ear Pro Headsets Mounting Arm Earmor S27: Y Harness for M31 Ear Pro Headsets Black