Technical specifications of Jaki JR781D motorized sewing machine Machine technology Mechanical (self-propelled engine) Number of needles 1 Sewing thickness Delicate dose and thick dose Number of stitches per minute 4500SPM Number of bases Single base Speed ​​(engine speed per minute) 4500RPM LED lights has it Engine type Servo Motor Speed ​​adjustment system has it Ability to keep the needle high when stopping the car has it Lubrication system Internal cartel Panel position Internal Panel technology Nanotechnology panel Carton size 540 * 230 * 586 cm