Feature: 1. When you need to quickly complete a large project, the automatic sewing bobbin winder can save a lot of time. 2. The metal plate can firmly support the bobbin winder and the bobbin on the workbench for easy work. 3. This fast bobbin winder is easy to operate, and the thread tension can be adjusted through the tension assembly unit. 4. Suitable for various industrial sewing machine bobbins, synchronous car bobbins, buttonhole machine bobbins, embroidery machine bobbins, etc. 5. The automatic bobbin winder can be used as a gift for beginners in sewing and embroidery. Specification: Item Type: Sewing Bobbin WinderApplicable Places: Service industry Accessories Use: Sewing equipment accessories Voltage: 90-220V Power: 20W Speed: 2500 rpm Applicable Bobbin Diameter for Winding Coil: Approx. 0.7mm / 0.03in Size: Approx. 14 x 7 x 6.3cm / 5.5 x 2.8 x 2.5in Installation and Use: 1. Place the spool on the spool of the winding machine, and pass the thread around the thread clamp 2. Connect the plug to the power supply and start winding 3. When the winding is full, the automatic induction stops. Package List: 1 x Winding Machine1 x User Manual2 x Screw