This microphone allows lecturers and presenters to move around freely well away from the lectern. To turn it on, slide the switch situated on the top of the unit between the aerial and microphone connection point. Healthy operation of the unit is indicated by the a red light momentarily switches on and off.
If the red light does not go out after you turn the microphone ON, the 9V battery needs replacing. Spare batteries are usually placed on the lectern.
The microphone output level is controlled by the microphone volume control on the Touch Panel.