The Simplicity Sidewinder is a battery operated portable bobbin winding machine. The Sidewinder allows you to pre-wind bobbins in preparation for your sewing project, whenever or wherever you want. Why waste valuable 'sewing time' winding bobbins on your machine, when you could be sitting in front of your favourite Create & Craft show winding simply and quickly on the Sidewinder. Being very compact it can be taken anywhere you want to go and is incredibly east to use. Place the cotton reel on the spool holder, take the thread around the winding wheel and then wrap around the bobbin. Push the button to start and that's it! The machine automatically stops when the bobbin is full, or you can just press the button to stop it at any time.