Features For 42 Stepper Motor Drive: Suitable for 42 stepper motor drive, 3D printer DIY, etc., very useful and practical. Onboard DIP switch Onboard DIP switch, which can easily adjust the drive subdivision, bring high efficiency. Compatible With 12V-30V Drive: Logic voltage of this driver expansion board is 5V, compatible with 12V-30V drive scheme. Applicable For A4988, DRV8825: Applicable modules for A4988, DRV8825, platform is microcontroller, very applicable. Terminal Power Interface: Come with terminal power interface, which is convenient to connect to the drive power. Specification: Item Type: Driver Expansion Board Board Size: Approx. 43 x 43mm / 1.69 x 1.69in Fixed: Approx. 3mm / 0.12in Hole Distance: 1400x1400mil(approx. 35.56 x 35.56mm / 1.4 x 1.4in) Logic Voltage: 5V Input Voltage: 12-30V Interface: Direction, enable, speed Port: Digital Applicable Modules: A4988, DRV8825 Platform: MCU Package List: 1 x Driver Expansion Board Little Note: Rotate enable, direction and speed control interfaces are all led out. Package List 1 x Driver Expansion Board