1 / 6KUUAUX SH402 5-in-1 Wall Stud Finder
The KUUAUX SH402 wall stud finder is a battery-powered scanner with wood-stud, metal and AC-wire detection modes. Its LCD and audio alerts provide scanning cues, while three stud-depth modes and a calibration step suit careful DIY locating work.
At a glance
- Five listed modes cover three wood-stud scan depths, metal scanning and AC-wire scanning.
- LCD direction cues and a continuous audio alarm indicate detected objects, according to the listing.
- Requires calibration against the wall before each measurement. The listing says to move it slowly and recalibrate if shaken or lifted.
Often bought together
Pros and cons
Pros
- Multiple scan modes address wood studs, metal and live AC wires with the same handheld tool.
- Three stud-depth settings give options for locating wood members at different stated depths.
- The display and sound alarm offer both visual and audible scanning cues.
Technical specifications
14 specifications| Brand | KUUAUX |
|---|---|
| Model | SH402 |
| Screen technology listed | LCD |
| Colour | Yellow |
| Wood stud scan modes | 1/2 inch(12 mm), 1 inch (25 mm) and 1.5 inch (38 mm) |
|---|---|
| Metal scan listed depth | 60 mm |
| AC scan listed depth | 51 mm |
| Metal detection examples | Magnetic includes steel bars,Iron, etc, Non-magnetic metals include wires, copper pipes, etc(2.36 inch/60mm) |
| Live-wire detection | Detects live cables under walls(Non-live cables may be detected by metal objects) |
| Power configuration | Battery Powered |
|---|---|
| Battery requirement | 1 9V batteries required. (included) |
| Battery cell type | Lithium Ion |
| Weight listed | 240 g |
|---|---|
| Package dimensions | 18.8 x 9.3 x 5.41 cm; 240 Grams |
What to know before buying
- The listing states that calibration is needed before each measurement and again if the scanner is shaken or lifted. It says to switch to AC mode if a wire icon appears in any mode, and to turn the scanner off when drilling.
Listing details to confirm
Listing details are inconsistent about battery specification: one field says a 9V battery is included, while another identifies the cell type as Lithium Ion. The package-size field also gives 240 Grams while a separate item-weight field says 240 g, and another description gives different package dimensions. Confirm the selected listing's battery and package details before purchase. Detection descriptions and stated depths are manufacturer claims, not independently verified performance.
What’s in the box
Included- KUUAUX Stud Finder (1)
- 9V battery (1)
- User manual ×1
Who is it for?
A good fit for
- DIY users locating wood studs before mounting shelves, frames or cabinets.
- Homeowners who want metal and live-wire scanning alongside wood-stud modes.
- Users who value both an LCD indicator and an audio alert while scanning.
Less suited to
- Buyers who need a tool that requires no per-measurement calibration.
- Anyone seeking a substitute for appropriate electrical safety checks. The listing's wire detection claims do not establish that an area is safe to drill.

Customer reviews on Amazon
- 5 stars
60% 60% - 4 stars
11% 11% - 3 stars
9% 9% - 2 stars
3% 3% - 1 star
17% 17%
Customer feedback describes the scanner as accurate, easy to use and precise, including a report of quickly locating studs behind drywall. The LCD is also described as clear and helpful, though one customer found it hard to read. Views on functionality and value are mixed, with reports that it can work well alongside hit-and-miss experiences. That variability matters for a tool whose listed use depends on calibration and careful movement. Aggregate ratings are also mixed, so the feedback does not establish consistent performance for every wall or job.
Positive themes
- Customers describe it as accurate, easy to use and precise.
- Some feedback appreciates its versatility for DIY and professional projects.
- The display is described as clear and helpful by some customers.
Mixed feedback
- Feedback on functionality and value is mixed, including hit-and-miss experiences.
- One customer found the display hard to read despite positive comments from others.
Frequently asked questions
What can the KUUAUX SH402 scan for?
The listing describes wood-stud scanning at three depths, plus metal and AC-wire scan modes. It also names pipes among detectable objects.
Does the SH402 need calibration?
Yes. The listing says to calibrate against the wall before each measurement and to recalibrate if the scanner is shaken or lifted.
What battery is included?
The contents list says one 9V battery is included, but the battery cell type field says Lithium Ion. Those details conflict, so check the selected listing before purchase.
Can the wire warning confirm it is safe to drill?
No. The listing describes live-wire detection and advises switching to AC mode when a wire icon appears. It does not establish that a location is safe to drill.

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