Features: Versatile Motor Control: This motor expansion board set supports up to 4 brushed motors or 2 stepper motors, utilizing TB6612 MOSFETs with 1.2A per channel output for stable and powerful motor performances. Advanced PWM Functionality: Includes a dedicated PWM controller operated via I2C communication, maintaining microcontroller PWM outputs while requiring only two pins (SDA & SCL) for multi motor control. Expandable Configuration: Allows stacking of up to 32 modules through 5 address selection pins, enabling management of 128 brushed motors or 64 stepper motors for complex project needs. Adjustable Speed Control: proposals unattached speed adjustment for brushed motors with approximately 0.5% resolution, additionally servo ports for various robotics applications. Optimized Power Handling: Operates within 4.5 13.5V extent, capable of handling short term current peaks up to 3A, ideal for demanding motor control tasks in development projects. Specifications: Connection option for 2 servos 4 H-bridges: 1.2 A per bridge, voltages ranges: 4.5 - 13.5 V Up to 4DC motors with individual 8bit speed settings - results in a resolution of approx. 0.5%. Up to 2 stepper motors (unipolar or bipolar) Size about 70x55mm/2.76x2.16in Package Includes: 1PC Expansion board note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution