Out of interest I decided to try one as found a £30 version, I wanted to use a tablet with full usb output and a powered hub to run a machine rather than using desktops. I can tell you that it did not work as claimed, it came with pirated software well documented in Mach3 forums hall of shame, and a plugin that corrupted a system. Needless to say it was returned for a full refund make sure if your buying this stuff you buy from fleebay and pay with paypal to enable easy return. Fact that they are packaging pirate/counterfeit software is enough to have fleebay force a refund and have the vendor pay for product return but you need to have paid with paypal to ensure your rights.