Additional Details ------------------------------ Product description: WORLDS FIRST REAL TIME SMART DETECTOR & IMAGING SYSTEM PROVIDING THE SHAPE, DEPTH, DIMENSIONS AND DISCRIMINATION OF UNDERGROUND METALS AND GROUND ANOMALIES, CAVITIES AND TUNNELS Invenio is the first and single revolutionary step taken towards turning a dream into reality in the metal detector industry! Invenio represents one of the most dramatic advances in metal detection technology since conventional metal detectors first appeared on the market in the 1930s. While many new features and advancements in technology have been introduced since, Invenio provides the first major step forward in meeting consumer expectations. On the other hand, users have been expecting a lot more from a detector: 1. To discover deeper targets 2. To know what type of a metal the detected target is. 3. To see the real depths of targets 4. The see the real shapes of targets 5. To determine the dimensions of targets 6. To detect ground anomalies/cavities Nokta Makro Detectors, since its foundation, has been taking steps towards turning this dream of users into reality. After years of extensive Research & Development and advanced engineering studies, Nokta & Makro has achieved the development of the world's first Smart Detector & Imaging system - the Invenio. Nokta & Makro owns the whole technology and know-how used in the Invenio for which 3 different patents are applied for. Invenio is designed as a platform that can be advanced and it is planned to be integrated with all hobby detectors (coin and relic) as well as gold nugget detectors in the future. Color: black Item name: Nokta Invenio Pro Metal Detector with 22x19", 15.5x14" & 11x7" DD Waterproof Search Coils, 3D Imager, 5kHz, 14kHz & 20kHz VLF Frequencies