Sharkk Basics Stud Finder LCD Display Multi Scanning Multi Function Smart Stud Finders with Ergonomic Design 3-IN-1 SCANNING FUNCTION  The Sharkk Basics stud finder come with special detection technology that allows you to detect wood, metal or A/C wiring. This special features keeps you from damaging unforeseen objects that are hiding behind your walls. LCD SCREEN  The easy-to-read LCD screen accurately displays what type of stud you are looking for as well as its position and the battery status of the device. SMART BEEP FEATURE  When a stud is located the stud finder will make a beeping sound indicating the studs location. EASY TO USE - Just scan horizontally from left to right across the wall and the stud finder will locate both ends of a stud and peak in the middle. ERGONOMIC DESIGN  The Sharkk Basics stud finder has grooves in each side that fit the contours of your fingers. The small groove located at the top of the stud finder acts as a marking guide so you can properly indicate the studs position. It is lightweight, easy to use and the battery is included.