DRITZ-Better Bobbin Winder. Fill bobbins evenly and fully from regular AND large spools of thread. Included is a special thread guide for filling bobbins with large spools of thread. This machine can fill bobbins completely; fill bobbin partially; fill bobbin from thread already in machine: no unthreading required; a built-in tension disk; the easy to follow thread guide fills most bobbins: plastic and metal; it's compact size makes it great for your sewing table or your travel tote; the removable cover stores conveniently under the winder and complete; detailed instructions are included. This handy little tool uses two AA batteries (not included) or the included UL approved power adaptor. Winder measures 3x5-1/2x4-1/4in. Winder features a 1 year limited manufacturers warranty. Imported.