ITEM NAME:L9110S PWM H-Bridge Stepper Motor Driver Dual DC Controller Module FT.Motor drive of double L9110S chip. PCB Board Size: Approx. Module port specification OA1 OB1 connect 2pcs pins of DC Motor, directionless. 1 x Motor Driver Module. IA1 input high level, 1A1 input low level, (OA1, OB1) Motor corotates.