- 2 HI-GAIN OMNI DIRECTIONAL MICROPHONES- FULL DYNAMIC RANGE HD SPEAKERS FOR CLEAR BALANCED SOUND- LOW NOISE / FREQUENCY TUNED FOR NATURAL SOUND CLARITY- INDEPENDENT VOLUME CONTROLS- SOUND DAMPENING COMPOSITE HOUSING- SOUND ACTIVATED COMPRESSION – 0.02 SECOND REACTION TIME- AUDIO INPUT JACK- RECESSED VOLUME CONTROL KNOBS- COMFORTABLE HEADBAND W/METAL WIRE FRAME- EXTERNAL BATTERY DOOR- OPERATES ON 2 ‘AAA’ BATTERIES – INCLUDED