The Garrett Super Scanner metal detector comes with a one switch operation. Detects medium sized pistol from 9''; large knife from 6''; razor blade and box cutter from 3''; foil-wrapped drugs and tiny jewellery from 1''. Has a Sharp audible alarm and bright red LED light indicates detection of metal. Also has a momentary push button temporarily eliminates detection of nearby ambient metal such as rebar, metal walls, etc. Has a Rugged, high-impact ABS case with reinforced coil compartment