Description Features: 1. Made of high-quality materials, not easy to break, can be used for a long time, durable. 2. Metal wood stem center detector, with the function of detecting metal and voltage wires. 3. It is used to detect the central position of metal or wood stems in the wall. In addition, it can detect the metal and voltage functions in the wall, and whether the wires in the wall are charged. 4. The direction of target will be shown on the LCD screen.The sound warning will be louder while the target is closer. 5. Easy to use: Turn on the stud finder, place it flat on the wall, press the scan button to calibrate. Notice: 1.Actual color may be slightly different from the image due to different monitor and light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Size: 153*66*37mm Specification: 1. Measure wood to metal STUDs up to 1-1/2 inches deep (38mm) 2. Measure metal to a depth of 2.36 inches (60mm) 3. Measure wires up to a depth of 2 inches (51mm) 4. Has live warning function 5. Low battery indicator 6. LCD large screen operation 7. Horizontal measurement range: 0-360 (4*90) 8. Display accuracy: 0.01 (about 0-1 and 89-90), other angles 0.05 9. Measurement accuracy: +/- 0.1 (0-1 and 89-90 or so), other angles +/- 0.2 10. Unit: degree , percent % 11. There is HOLD function to freeze the current test results 12. The screen can automatically read in reverse (in the case of 180 flip) 13. With backlight and sound prompt function Automatic shutdown after 14.3 minutes 15. Operated by 1 6F22 9V battery includes: 1 x Wall Detector (Not include battery)