Description. Our electric bobbin winder is made of high quality ABS and alloy, sturdy and durable. The small and compact design makes it easy to carry. With an extra metal wire holder, it can accommodate a wider range of wire types and sizes. Key Features Easy to Use: No more unraveling the thread of your sewing machine to wind the bobbin, with the electric bobbin winder, it helps you to fill the bobbin easily and it will stop automatically. Compact and Portable Design: Our electric bobbin winder is designed as a simple suitcase with a pull-out top handle, easy to carry. Specification Product name: Automatic Bobbin Winder Material: ABS + alloy Size: 13.8cm long, 10.6cm wide, 7.8cm high Product power: 7.2W Power supply: 5VDC or 2 AA batteries (both not included) Color: white Notes: 1.There may be slight differences between the picture and the actual color of the commodity. We will try our best to show you the exact color. 2.Please allow slight dimension difference due to manual measurement.