Zircon stud finders are designed to be as effortless as possible. Place the stud finder flat against the wall, press and hold the power button, and wait for 1-2 seconds. The tool automatically calibrates to the wall’s surface.
If there is a calibration error, or if you have started over a stud, the tool will intermittently beep and the lights may flash. Please release your finger from the Power button, move the tool over a few inches to the left or right and begin the calibration process again.
More info – Zircon Tip Minute 15 Why You Need to Calibrate a Stud Finder