Maximum sewing speed: 1400 rpm
Width of needle vibrating: 2-4.5 mm
Button clamp movement: 0 - 4.5 mm
Number of sitches per button: 20 stitches (16 seams)
Stitch type: single thread chain stitch
Size of buttons: 9-26 mm in outside diameter
Built-in Shift Cam for switching between cross-over stitch pattern and parallel stitch pattern.