"EUREKA" is what some early gold prospectors exclaimed when they found gold.......and this 3 frequency (6.4kHz, 20kHz, and 60kHz) detector will find the smallest of nuggets as well as the "big boys". The Minelab Eureka Gold is a triple frequency detector with the excellent ACCU-TRAK Ground Balance system for handling the very difficult terrain and soil usually found in gold producing areas. With a 10" DD, Easy Sweep Elliptical coil, and state of the art NiMH rechargeable battery system, Eureka Gold has a nose for the "yellow metal".