... needle. 2.ultrasonic sewing machine Speed:8-20m/min... ultrasonic fabric sewing machine CharacteristicsPower Supply: 220V±5V 50Hz (60Hz)Working Frequency ... ribbon, tent, raincoat, tablecloth, chair cover, bedspread, pillowcase, quilt cover, curtain, handkerchief, coloured flag, disposable operating coat, non spin respirator, handicraft ...