About this itemDetects Ferrous and Non-Ferrous MetalOperating Frequency: 110 kHzChoice of Audio Alarm or Silent Vibrate AlarmEasy to Use, 3 Position Switch for Power, Audio and VibrateSensitivity Setting at Optimum Level – No Tuning RequiredBalanced and Lightweight – Under 12 ozRequires 1-9Volt Batt..
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