... SPEED CAN REACH 700RPM4 IT DOES NOT NEED BOBBIN THREAD WHEN EMBROIDERING, WHICH IMPROVE EFFICIENCY AND REDUCE EMBROIDERY COST ... . IF EMBROIDERING 1 SEQUARE CENTIMETRE WITH 900D RAYON THREAD ONLY NEED TO BE FILLED WITH 30 STITCHES,WHEN ... , HOME TEXTILE AND CRAFTWORK.7 AUTO COLOR CHANGE, AUTO TRIMMER, AUTO THREAD BREAKAGE DETECTING.DURING EMBROIDERING, WHEN THREAD BROKEN OR SHUTTLE HOOK POSITION ERROR ...