Proven to accurately detect concealed metallic items, the SuperScanner V is the most recognized hand-held metal detector in the world and has led the industry for over 20 years. Additional features: No tools required to change battery Sharp audible alarm and bright red LED light indicator Momentary push button eliminates ambient metal detection Large 10-inch scan surface for quick, thorough sc anning Green LED light indicates ON Amber LED indicates low battery Red LED indicates ALARM One switch operation.