Features 1.Application: Based on for RasPi 40PIN GPIO interface design, Motor driver chip is suitable for RasPi series motherboards and for Jetson Nano. 2.Drives 2 Stepper Motors: Stepper motor HAT onboard two channels HR8825 Motor driver chip, built in converter for easy control, can drive two Stepper Motors. 3.6 Microstepping Mode: Stepper motor HAT (B) supports the selection of six different step resolutions by dip switch: full step, half step, 1/4 step, 1/8 step, 1/16 step and 1/32 step. 4.High Performance: Support motor drive current adjustment through potentiometer, support up to 2.5A current output, support overcurrent protection, heat off, undervoltage locking. 5.5V Chip: Onboard 5V voltage regulator chip, can directly supply power to for RasPI, onboard a variety of stepper motor interface, convenient access to different stepper motors. specificationItem Type: Stepper Motor HAT (B) Model: Stepper Motor HAT (B) Material: PCB Hole Diameter: Approx. 3.0mm/0.12in Motor Driving Voltage: 8.2-28V Motor Driver Chip: HR8825 Maximum Current: 2.5A Application Scenario: Used for 3D Printing, Sculpturing Machine, Mechanical Arm and Other Applications PackageList 1 xStepperMotorHAT (B) 1 x Cooling Plate 2 x Screw Rod 3 x Screw 3 x Nut NotePlease allow some errors due to manual measurement.