Feature: 1. Can use 988/DRV8825. Pay attention to the installation direction, otherwise the driver even the motherboard may be burned. 2. Jumper is hit the position of ON DP, meaning 16 segment (4988) or 32 segment (8825) 3. Connect Jm to motor. 4. Connect Jv to 5v and 12v-24v power supply. 5. E/S/D/G of Jc respectively corresponding to the connection of the Enable/Step/Dir/Gnd drive signal output. Specification: Features: Can use 988/DRV8825. Pay attention to the installation direction, otherwise the driver even the motherboard may be burned. Jumper is hit the position of ON DP, meaning 16 segment (4988) or 32 segment (8825) Connect Jm to motor. Connect Jv to 5v and 12v-24v power supply. E/S/D/G of Jc respectively corresponding to the connection of the Enable/Step/Dir/Gnd drive signal output. Specifications: Color: Shown as the pictures Package Weight: 9g Note: Pay attention to the installation direction, otherwise the driver even the motherboard may be burned. Package included: 1 x 988 DRV8825 Stepper Motor Control Board for 3D Printer