The Franklin Sensors ProSensor 710 is a professional-grade stud detector that is more accurate, faster and less error prone than other products on the market. The ProSensor 710 senses the wall in thirteen locations simultaneously, then immediately illuminates the display elements that are in front of a stud. It identifies the width of hidden objects immediately, and can identify the position of multiple objects simultaneously. It has a far greater sensor pad surface area than conventional stud detectors to accurately identify objects through many difficult architectural features. Finding studs behind thick walls, wall and ceiling textures, uneven plaster thickness, uneven paint, and difficult wallpaper causes other sensors to fail, but it is no problem for the ProSensor 710. This product requires 2 AA batteries for operation (included).