6 
CONTENTS
Detector Settings
BACKLIGHT
The VANQUISH 540 has a red backlight for detecting in low‑
light situations� The Backlight is turned off by default at each 
start‑up to reduce battery consumption�
Press the Backlight button to turn the backlight on or off� The 
Backlight Indicator appears on the display when the backlight 
is on�
The Backlight button The Backlight indicator
VOLUME
The Volume control changes the loudness of target signals�
Use the Volume Minus and Plus buttons to adjust the Volume 
Level� Each press will decrease/increase the volume by one 
level�
The Volume  
adjustment buttons
A low tone will sound when the maximum or minimum volume 
level is reached�
The Volume Level indicator on the display shows the current 
approximate Volume Level� Each bar represents two levels�
The Volume Level indicator showing 
maximum volume (levels 9 or 10)