Garretts SUPERSCANNER is a World Renowned Hand-Held Metal Detector. Trust the original, patented design; the most recognized handheld metal detector in the world. The industry leader for more than 25 years, the SuperScanner is backed by ongoing state-of-the-art Garrett engineering. Ultimate sensitivity: detects medium sized pistol from 9 distance; large knife from 6; razor blades and box cutters from 3 distance; foil-wrapped drugs and tiny jewelry from 1. Self-calibrating: digital microprocessor technology eliminates the need for periodic sensitivity adjustments. Rugged, high-impact ABS case with reinforced coil compartment. Exceeds Mil-Std-810F (drop test) Method 516.5, procedures II and IV. Large 8 scan surface for quick, thorough scanning. Three-color LED indication: Green LED indicates ON; Amber LED indicates LOW BATTERY: Red LED indicates ALARM Sharp audible alarm and bright red LED indicates the detection of metal. Momentary push button helps temporarily eliminate detection of nearby ambient metal such as rebar, metal walls. Operating temperatures: -35º F (-37º C) to 158º F (70º C) No tools required to change standard 9V battery (included). Optional rechargeable battery kit available.