Stanley Fatmax Stud Finder 400 Manual Verified [SAFE]

Sounds distinct tones when it successfully calibrates and when it reaches the center of a stud. Operating Instructions (Verified Manual Steps) 1. Preparation and Battery Installation Open the battery compartment on the back of the unit.

The 400 cannot distinguish live wires from studs. If you get a beep in a location where no stud should logically be (e.g., 12 inches from a known stud), it might be a wire. Turn off the room’s power and use a non-contact voltage tester to verify. stanley fatmax stud finder 400 manual verified

: If there is a date code starting with "R" , your unit is not defective . Sounds distinct tones when it successfully calibrates and