Product description: Available operating modes: All Metal - is in standby mode. In this mode, metal is detected by a stationary coil, and the detector emits a constant signal. The detector does not need to be moved from side to side. Set GND BAL in All Metal mode and then repeatedly press GND TRAC to eliminate normal minerals and ores. The detector alerts to all detected objects with a medium tone in All Metal mode. Disc, Notch, and Auto-Notch - there are operating modes in motion: In these modes, the detector informs about detected objects with three different pitch tones. The detector operates in automatic ground balancing mode. Sensitivity can be adjusted as needed, and manual ground balancing is not available. Use the Disc and Notch settings to discard worthless metal items. In motion mode, the coil must be continuously moved to detect objects. Technical specifications: Model: Maclean MCE930 LCD Item number: MCE930 Coaxial search coil: 9.5 inches (24 cm) waterproof coil Operating mode: dynamic/static Tuning: automatic/manual acoustic alarm and graphical target ID Distinguished Metals (Disc) built-in speaker Headphone output: 6.3 mm Operating frequency: 6.5-6.7 kHz Weight: approx. 1.5 kg adjustable arm length Power supply: 2x 9V batteries (not included) Battery discharge indicator: 11.6 V Current consumption: 35 mA Warranty: 2 years Unit of measurement: pcs.