Gooseneck Microphone JTS ST-5050i This is the main unit. I bought it for home use and video conferencing, but I didn't use it much. I've had it for about 5 years, but I've only used it two or three times, so it's in good condition. ■ 3 Modes 　Push On/Off (Mute) 　MOM.ON: Talk while the switch is pressed 　MON.OFF: Mute while the switch is pressed ※ It takes about 2-3 seconds for the audio to actually reflect after the switch is turned ON/OFF. ■ Power: 9V battery, Phantom power (12-48V) ■ Size: 158 x 101 x 33/61mm ■ Weight: 0.82kg ※ When using a dynamic microphone, even if the switch is turned OFF, it will still pick up some sound and will not be completely muted. ■ Weight: 1.15kg ■ Power supply to the microphone Phantom power: Approx. 16V Battery power: Approx. 2.6V