As you approach a stud, the bars will begin to illuminate from the edges toward the center. Find the Center:

Place the unit in a spot where there are no studs.

. If you see a "Low Battery" icon on your LCD, swap it out immediately, as low voltage can lead to false readings. Calibrate Against the Wall

: The device features continuous AC detection , identifying live wires up to 2 inches deep for safety.

Nothing happens when I move (No beep, no bars).