Earmark's TT-Guest Headset Radio is a listen-only portable radio built into noise reducing earmuffs. It allows you to listen to a teacher or tour guide equipped with TT-Guide noise reducing headsets and listen to a voice signal coming from a TP-2 portable microphone/transmitter which has been repeated from a TT-Guide headset.

If you need to  high noise environment, the Earmark 4S Radio Headset makes you truly productive. The 4S provides the best combination of performance, durability,  and comfort available while giving you a substantial Noise Reduction Ratio (NRR) of 23, allowing you to communicate around high noise equipment like turbines, pumps, jet engines, and corrugators, everyday

Engineered to perform continuously, in tough industrial environments, Earmark's TT-Guest Radio Headset is a state-of-the-art piece of communications equipment. With earcups constructed of "T" grade ABS plastic and utilizing monobloc cup construction, the TT-Guide stands up to rough handling. Powered by one 9 volt alkaline or rechargeable NiCd battery, this radio Headset gives a battery life able to last for many tours or training sessions. The battery compartment is sealed against moisture and dust to reduce the chance of corrosion.

Comfort means a lot. We try hard to make you as comfortable as possible when you use Earmark radios. The TT-Guest 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 off when you bend forward. The glass-filled Delrin headband pivots easily, changing the pressure points on the soft, hypo-allergenic earmuffs. By moving the headband you can vary the load over the course of a day. Earmuff covers help avoid perspiration problems and provide sanitary protection. Optional hard-hat mounts can be provided for areas that require use of hard hats. Hard-hat and mounts are available at a moderate additional cost.