Description: Can drive 4 DC motors or 2 stepper motors or 2 Servo. Up to 4 bi-directional DC motors with individual 8-bit speed selection. Up to 2 stepper motors (unipolar or bipolar) with single coil, double coil or interleaved stepping. Pull down resistors keep motors disabled during power-up. 2 external terminal power interface, for seperate logic/motor supplies. Specification: Material: FR-4 Epoxy Glass Fiberboard Size: Approx. 7.0 x 5.3 x 2.0 cm / 2.76 x 2.09 x 0.79 inch Package Includes: 1 Piece L293D Motor Drive Expansion Board Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement