BYPASS: Automatically disable slow start function when screwdriver in reverse rotation, easier to reverse screws. Adjustable slow start speed from 30% to 100% of normal speed, Slow start level setting from L1-L2-L3-....L9-L0 Provide output start signal/ break signal/ forward and reverse signal with MOS relay switch Compatible with KILEWS Brushless DC SKD-BN / BK series Slow start time can be set from 0.1 s up to 9.9 second Dimension : 58x95x35mm (LxWxH)