its one of those crappy units sold through Kellyco, way overpriced at 250.00 or so , they sell some real crummy stuff (they sell good stuff too) but they have a few brands that are pretty much exclusive to them, the trident and the cobra and those MP units are all poorly functioning machines and a person should steer clear of them in my opinion, you would do ALOT better to buy a minelab advantage or a garett Ace 250 both close to that price range, the advantage is probally more money but it is 3 times the machine that the ace 250 is.......