Feature 1COMPATIBLE MACHINES: The CNC shield expansion board driver is a flexible package with a three axes stepper motor driver that is compatible with most shield designed for microdrive laser engraving machines and three axes CNC engraving machines 2VOLTAGE AND MAINTENANCE: The CNC shield expansion board driver kit uses a power supply DC5V interface and 7.512V voltage input, which is compatible with for GRBL for easy maintenance, parts replacement, upgrades and expansion 3CONTROLLABLE MOTOR: The 2A CNC shield board driver can be controlled within a two phase, four wire stepper motor and can be started simply by connecting to the computer using a USB cable or using an AC to DC adapter or battery 4A4988 DRIVE: Easy stepping and direction control can be made before making the A4988 module prevent static in short circuit 5MAIN PURPOSE: CNC shield board driver can be used for engraver or 3D printer driver to build small CNC routers, engravers, milling machines or robotsItem Type: CNC Shield Expansion Board DriverMaterial: PCBUse: Can be used as engraver or 3D printer driver, for building small CNC router, engraver, milling machine or robot .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x CNC Shielding Plate1 x Stepper Motor Driver4 x Drive4 x Radiator1 x USB Cable1 x Pin Header