High Performance Metal Detector Features the Very Latest Electronic Digital LCD Technology and Styling. Ergonomic and Innovative Design in Constructed With An Adjustable Shaft and Foam Grip, Features an Auto Calibration System. Informative Back-Lit Blue LCD Panel Displays whether the Found Object is Ferrous or Non-Ferrous, the Strength Signal and the Battery Life. Requires Six AA Batteries, Not Included. Ages 8 and Up.