The Stanley FatMax 400 is powered by a standard (typically a 6LR61-type alkaline battery), which is not included. To install it:
Use the marking channel at the top of the unit to mark the stud center. Step C: AC Wire Detection Stud Finder 400
Always keep the unit flush against the wall. Do not rock it. stanley fatmax stud finder 400 manual verified
Replace the 9-volt battery with a brand new alkaline cell. Carbon-zinc batteries often do not provide enough sustained current for deep-scanning sensors. Missing Known Studs
: Keeping the button held down, slide the device slowly and horizontally across the wall. Detection : The Stanley FatMax 400 is powered by a
This article is an independent, verified user guide. Not affiliated with Stanley Black & Decker. Always cross-reference with the official product manual for your specific manufacturing run.
The Stanley FatMax Stud Finder 400 offers several benefits to users, including: Do not rock it
: Includes standard STUD mode (wood and metal profiles), METAL SCAN mode (for copper or steel pipes), and AC TRACKING mode (for detecting live electrical wires).