SILUER D7 SMART PATTERN SEWING MACHINE WITH STEP MOTOR, innovative appearance and structure, strong and smooth outline.step motor controls stitch length directly, more accurate. Step motor controls back stitch directly, noiseless sewing experience. Multi-functional pattern stitch, patterns can be adjusted freely, straight line, rice stitch, etc., easy operation, higher efficiency. Applicable from light to heavy weight materials, from knitting fabric to 10-layer jeans, same stitch quality, no need to adjust thread tension. It is widely used in all sorts of shirts, suits, jeans, cotton clothes, downjackets, etc.