This fun and useful kit distinguishes between Metal and Non-Matal (Copper, Gold, Silver, Aluminium Etc.) Tone & 5 LEDs Indicating Metal and Non-metal Intensity. Knob For Sensor Sensitivity Adjustment. Knob For Adjustment of Non-metal Discrimination. One Stereo Output Plug For Connecting To Earphone. Instruction Manual. Requires 9v Battery (available separately). Ages 10+

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