3.High efficiency, choice different speed upon different pcb. Vlow=150mm/s, vhigh=300mm/s 4.High accuracy, better safety; machine operation is simple and it is easy to maintain; 5.The blade has special treatment so that long lifetime; 6.During operation, keep pcb and the circular blade is moving to assure quality. Three spec 1.Power:ac 220v/50hz 2.Thickness of pcb: 0.8~2.0mm 3.The limit height for component over pcb is 33mm and the limit height for component under pcb is 25mm;after removing front supporting plate, the limit height component under pcb is 40mm 4.Speed options: vlow=150mm/s, vhigh=300mm/s; Wooden boxes which all have been fumigated.