V.C.O. Audio Response for Precision Pinpointing: The Fisher Labs Gemini-3 features Variable Circuit Oscillator (V.C.O.) audio response, offering clear, precise feedback to help pinpoint targets accurately, ensuring you never miss valuable finds during your treasure hunts. Multiple Search and Trace Modes: With inductive search mode and conductive trace modes, the Gemini-3 provides versatility in various detecting conditions. The wide and narrow scan modes allow you to customize your search based on terrain and target size, improving detection efficiency. Advanced Noise Reduction Technology: Equipped with 60-cycle noise reduction circuitry, this metal detector minimizes interference from surrounding environments, delivering cleaner, more accurate signals for a smooth treasure hunting experience in challenging conditions. Long Battery Life and Battery Test Meters: Powered by 16 AA batteries (8 in the transmitter and 8 in the receiver), the Gemini-3 ensures long-lasting performance. The built-in battery test meters help you monitor battery levels, ensuring you're never caught off guard by a dead battery. Lightweight and Ergonomic Design: Weighing only 7.5 lbs. (3.4 kg), the Fisher Labs Gemini-3 is lightweight and designed for comfort, allowing you to conduct long detecting sessions without fatigue, making it perfect for both beginner and professional treasure hunters