all-sun TS130 Metal Detector Hunter Coin Finder Golden Digger Easy operation: the pinpointing metal Detector is simple to use and lightweight enough to make it portable and convenient to carry on location hunting. Treasure hunt: search the backyard, beach, or park for all kinds of valuable metal from iron relics to Gold coins Find buried treasure: 2 detection modes ground balance mode and discrimination mode) to filter out Garbage metals Built-in Speaker: the metal pin pointer Detector features a built-in Speaker for audio sound and adjust the volume of the Speaker and headphones. Max detecting depth: my testing result shows that the max detecting depth: 2 m. (* the detecting range Depends on the size of metal, the metal purity, solid quality and the operation of machine.)