Heil Proset headphones - unknown element

Heil Sound PSE-IC Pro Set Elite IC Headset for Icom Radios

Heil Sound Pro-Micro Single Side Boom Headset Black 3.5mm ICOM AD-1-IC Cable

Heil Sound Pro Set Elite 6 Headset - Authorized Dealer

Heil Sound PSMP Headset & condensor boom mic

Heil Sound Pro Set Elite 6 Headset

2 Way Radio Headphones with Mic Ham Radio Intercom Ptt Headset Boom Microphone

Heil Sound PSMP Headset & condensor boom mic for PC