INSTRUCTIONS TO GET THE MOST USE AND ENJOYMENT QUT OF YOUR FM HEADSET MICROPHONE. PLEASE READ AND UNDERSTAND THE INSTRUCTIONS BEFORE USING. BATTERY INSTALLATION 1 To unscrew the battery cover 2 Install three new batteries (AG 1) in accordance with the instructions located in the battery compartment. Replace the battery cover 3. The microphone can be tested for operation by pushing the ON/OFF button to the "ON" position. NOTE: When using the FM Microphone, hold the Microphone (2 Inches) 5.