The delivered product is a bare bones one - there are no instructions (remember to bookmark the product page or the videos). It functions well. The plug is a Type-I - although they provided an adaptor, it is a Type-C; I would rather have a Type-G. Curiously, the label on the speed knob is missing. The provided saw blade is 150mm x 2mm x 20mm with alternating angle 40 teeth. It was a bit sticky, probably the plasticizer is leaking from the blade protector. The housing is ~158mm wide, so I would advise buying any 160mm or above saw blades. The biggest issue to me is the soft brittle styrofoam they use to pad the unit at the sides. Unlike the hard styrofoam used for the ends, this soft stuff breaks apart easily and the bits and pieces fly and stick everywhere inside and outside the box. They also stuck to the flexible cable and water tube. Although they can be scrubbed off the cable, they seem to have melded with the water tube, roughing its surface with styrofoam bits.
Very fast delivery and item is excelent!! A DC motor is used, and the number of revolutions is controlled by current control by TRIAC. Disk inner diameter is 16mm/20mm,it's reversible.