JRC Radar 3000 Instruction Manual page 25

3.7.7 BUZZER VOLUME
At the time of shipment, the Buzzer sound has been set to maximum position.
When it is necessary to lower the volume.
① In the initial setting menu select BUZZER.
② Adjust the suitable buzzer sound level using the J-DIAL.
③ Press the JOYSTICK to end the buzzer setting mode.
18 INSTALLATION