Tired of winding bobbins by hand on your sewing machine? This electric bobbin winder is here to save you time and effort! It's a small, portable device that winds bobbins quickly and evenly, and it automatically stops when the bobbin is full. You can power it two ways: either with 2 AA batteries (not included) or with a USB cable connected to a 5V adapter (like a phone charger). It works with both household and industrial sewing machine bobbins, thanks to its two different bobbin fixing structures. It has a bottom suction cup to keep it stable while winding, a lock feature, a hidden handle, and a dustproof cover. Measuring about 3.3 x 5.4 x 3.7 inches, it's compact enough to store in your sewing kit. A super handy tool for any sewer, quilter, or crafter – perfect as a gift for a wife, daughter, or grandmother who loves to sew. Makes prep work a breeze!