Description:1. For  A4988 / DRV88252. Jumpers are hit on the DP position represents 16 segments (4988) or 32 segments (8825).3. Jm connected to the motor.4. Jv connect 5V and 12V-24V power supply5. Jc E / S / D / G corresponding to the connection on the Enable Step Dir Gnd drive signal output.6. Size: 34x41mmNote:Note the direction of the installation, or may burn the driver or even the motherboard.Package Included:1 x Stepper Motor