The Series 4S Headset Earmark's 4S radio headsets are two-way, simplex portable radios built into noise reducing earmuffs. If you work in high noise, or around machinery, Earmark radio headsets help make you truly productive. These headsets provide the best combination of performance, durability and comfort available. The sealed battery compartment protects against moisture and dust.
Comfort means a lot.
We try hard to make you as comfortable as possible when you use Earmark radios. The Series 4 Headset features a Vertical Support Strap to distribute the weight evenly, across the top of your head, and a back strap to keep the Headset from falling when you bend forward. By moving the headband you can vary the load over the course of a day. Earmuff covers help avoid perspiration problems. Hard-hat mounts snap in, in place of the headband.