Detects wood/metal studs through multiple wall thicknesses (1/2-Inch, 1-Inch, 1-1/2-Inch) * Continuous live wire detection for safety * Lcd screen is back-lit for greater visibility when detecting studs * Laser line can be projected along the entire length of the stud; versatile 2-laser set can be used separately or together to create horizontal and vertical laser cross lines * Limited lifetime warranty