Smart Drive Technology (SDT). Smoother movement and less vibration. Quieter embroidery. Less loop formation. The Embroidery Module M with BERNINA Smart Drive Technology (SDT) elevates your embroidery experience with enhanced stitch quality, as well as smoother and quieter movement Exquisite embroidery. The Embroidery Module with Smart Drive Technology (SDT) will allow you to achieve reliable and breathtaking embroidery results. All embroidery projects can be carried out comfortably using the generous embroidery area. This embroidery module also makes it easy to embroider already-closed tubular sewing projects, such as blouses and small t-shirts thanks to freearm embroidery Close Compatibility.