By default threading is done for sample stitching. entire process of using product is mentioned in manual. inner and outer handle "dissociation" function. Convenient to use and has to understand that it is single side stitching machine which can be used for small mending purposes only,if think that this product can work like bigger machines then it is not possible with this product. Has to insert batteries which are not included with the product. This product is a single sided stitching machine. card operation on the lock directly, no computer or software needed.two-gear clutch device, excellent stability Handheld sewing machine repairs delicate facrics like silk ideal for quick repairnbsp; this sewing machine is light enough for you to take anywhere includes bobbin with thread and needle comes with using instructions, easy and convenient to use material plastic power supply 4 x aaa batteries (Not included).