• Portable and lightweight enough to carry to classes • Runs on two AA batteries or a power cord • Automatic shut-off when bobbin is full • To stop a bobbin before it is full, push the lever away from the bobbin • Wind metal or plastic bobbins • Adjustable tension knob to accommodate different thicknesses of thread • Works with most bobbins **Does not work with Husqvarna/Viking and Singer Centaur • Not intended for professional use.