Description: A, B, C, D four-phase LED indicates the status of the stepper motor work. Stepper motor with a standard interface, when used directly pluggable. ULN2003 Darlington using high-power stepper motor driver chip Size: Approx. 100x60x15mm / 3.94x2.36x0.59inch Color: as pictures shown Package Includes: 1 piece of 5V Stepper Motor 1 piece of ULN2003 Drive Test Module Board