... segmentation, digital and intelligent protection driver; 6.Variety of output interface Serial ports. USB port. SD card 7.High ... LCD bottom screen, aesthetic red, yellow, green and blue silica gel buttons. 9.Precision mechanical transmission mode, ensuring high efficiency ... 51 chip)Control Panel16*4 character LCD display, 10 silica gel buttons, easy-to-use and durableDriverHigh speed stepping motor, ...