Zircon 60371 i65 OneStep Wood, Metal, and Live Wire Stud Sensor 1-step stud finder identifies center of stud; automatically recalibrates and points to nearest stud Finds wood and metal studs up to 1-1/2 inches deep, and hot AC wiring up to 3 inches deep Durable plastic case, easy-to-read LCD screen 6.2 by 3.04 by 1.35 inches; 6 ounces; 1-year warranty