The microphone is a long gooseneck condenser microphone that is sensitive and unidirectional. To provide visual identification, the microphone has a diffused LED housing. Each unit has a built-in speaker that provides crisp and clear sound reinforcement. You can adjust the output level of each speaker using the recessed volume control. Each unit includes a headphone output and a TALK switch. The MIC LEVEL LED on the delegate unit blinks to indicate microphone input level.