Klein ESF200 Multi Scan Stud Finder LED indicators illuminate the full width and edges of studs, providing a straightforward and accurate locating experience for both DIY users and professionals Automatically calibrates for accurate results, enabling efficient stud detection without requiring manual adjustments Detects live AC wires, wood, and metal automatically, eliminating the need to switch modes for a smooth and efficient experience Single-touch power button lights up green when activated and remains powered on without requiring continuous holding until the user manually turns off the stud finder or it automatically shuts down Designed with protective guards to prevent fingers from rubbing against walls during scanning, while being compact enough to easily fit into tool bags Protective felt backing safeguards walls from marks or damage, ensuring clean and worry-free stud locating