Pfaff External Bobbin Winder This portable bobbin winder lets you wind bobbins without unthreading your Pfaff sewing machine. Easy, one-touch bobbin winding with automatic shut-off when the bobbin is full. The compact design allows you to easily take it anywhere. One-touch bobbin winding with auto shut-off when full No need to unthread your machine Power adapter included, or use 4 AA batteries (not included) Compact and portable For use with Pfaff bobbins (bobbin size L, not machine group L; does not fit Icon bobbins) Compatible Machine Groups Group J: creative sensation pro II, creative sensation, creative vision, creative performance, creative 4.5/4.0/3.0/2.0, performance 5.0/5.2, quilt expression, expression series Operation Directions Open top cover by pulling up on lock tab. Lift up spindle to fully extend position. Place spool of thread onto spindle. Follow directional arrows and wind thread through eyelet and around thread tension disk. Pass end of thread through the hole in bobbin, insert bobbin onto bobbin winding shaft, and twist bobbin gently until spring on shaft clicks into place. Make sure bobbin bar fits between top and bottom rims of bobbin. Press "On" button to start. Bobbin automatically stops winding when full. Note: Only use the provided power adapter and insert into the side power port of the bobbin winder, or use 4 AA batteries (not included). Compatible Machine Groups J Not sure which group your machine is? Find Your Machine Group