Specifications include, but are not limited to: 1. Sewing Speed: max 4200sti/min, normal 3600sti/min. 2. Needle bar stroke: 34.6mm 3. Knife Size: ¼” – 1-1/4” (6.4mm-31.8mm) 4. Buttonhole width: Max 5mm 5. Buttonhole length: Max 41mm 6. Precision of needle throwing mechanism: 0.05mm 7. Needle thread tension: Active Tension 8. Number of stitches: Automatically computed from the size of the buttonhole and stitch pitch 9. Needle: DPx5 (#11-14) 10. Hook: DP type, full-rotary hook. 11. Lift of work clamp: 14mm 12. Auto-Lifter: Provided as standard (stepping motor type) 13. Needle Throwing System: Stepping motor 14. Cloth Feeding system: Intermittent feed by stepping motor 15. Cloth Cutting System: Stepping Motor 16. Number of Standard patterns: 31 Patterns 17. Number of patterns that can be input: Max 99 patterns 18. Bobbin thread winder: Built in the machine head 19. Machine head drive system: Compact AC servomotor (direct drive system)