The Butterfly JH8190 (often sold as the JH8190S) is a portable, electronic tabletop sewing machine designed for home tailoring, crafting, and alterations Includes 12 to 14 built-in stitches covering straight stitching, decorative patterns, and zigzag embroidery.Buttonhole: Equipped with a 4-step automatic buttonhole function.Free Arm Design: The detachable extension table converts the machine into a free arm for sewing cylindrical items like sleeves and trouser hems.Adjustability: Features easy-to-use dials to adjust both stitch length (up to 4mm) and stitch width (up to 5mm).Build: Constructed with a durable, traditional metal chassis housed in a lightweight plastic outer shell.