To Install A Normal Thread Spool:1. Loosen the bobbin nut and take off bobbin.2. Side thread spool onto extension spindle.3. Connect the extension spindle on bobbin shaft.Adjusting Thread Tension:1. If stitching is too tight, turn tension control slightly to the left.2. If stitching is too lose, turn tension control sightly to the right.Basic Information:♔Requires 4 x AA batteries (not included). Please pay attention to the order of positive and negative battery♔Make sure your fabric is 1.8mm thick. Materials that are too large, too hard or too soft cannot be sewn♔Metal gears have high strength, low hum, and are not easy to slip♔22.8cm high and 14.8cm wide♔PP and ABS materialNote: ♔This is a Single Thread Sewing Machine, so you have to Tie A Knot by yourself ♔If you don't received or lost user manual, we will offer electronic edition immediately ♔If the product can't work smoothly ♔Can't mix the battery with different brand or mix the battery with old and new ♔Wait for a moment when the battery get too hotPackage Includes: *Spindle*Needle Threader*2 Extra Needles*3 Extra Bobbins with Thread
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