No need to adjust after changing the needles, thread, or fabrics;Feeddog synchronization, anti layers mix, save ironing time;Anti needle jump.anti thread break, save maintenance;Unique twist control technology,easily sewing the mercerized thread.

缝制多达9种不同线迹的花样缝Sewing up to 9 differentstitch patterns

三分之一补针键 灯光三档可调One-third half stitch keythree level light adjustable

步进电机，更安静平稳Stepper motor for quieter andsmoother