Battery type: 9V dry battery (delivered without battery) Features: The new 1.5-in-1 design is more powerful, more accurate, and lasts longer. 2. This product can quickly and easily locate wooden metal studs, joists, metal pipe reinforcement and live AC wires behind walls, floors and ceilings. 3. The design of the alarm allows you to always know the situation of the wall, so that the operation is more accurate. 4. SH402 wall detector can clearly identify what objects are inside the wall, which is more intuitive and accurate. Wood detection, metal detection, current detection. 5. Wide range of adaptation, as long as you want to see the internal situation of opaque objects, you can want to use it. 6. Use upgraded internal sensors. It senses changes in the density of the space behind the wall and locates the stud center very accurately. Specifications: Model: SH401 Product material: PC/ABS Product color: silver Product net weight: 170g Alarm mode: Tweet Battery type: 9V dry battery (shipped without battery) Display: LED green backlight screen

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