Using 32bit 100M Cortex-M3 MCU-LPC 1768, and improve its performance highly. Support highly modular open source firmware, easy for secondary development. Support network function, then proceed remote control via IE Explorer. Using DRV8825 stepper driver which supports 32-microstep and with excellent cooling. Currents of the stepper motor can be set directly, which can avoid the damage . Using high quality FR-4 4 layers PCB and special design for cooling. Using professional power chip, support 12V-24V DC input. Good to work with LCD12864 and MKS TFT touch screen.(Can't work with MKS MINI12864LCD,OLED12864 and LCD2004 display.) Could be connected to touch-screen MKS TFT28. Net Weight: 130g Material: PCB Colour: Black Dimensions: 146.5 x 95mm Note: Pls confirm whether the positive and negative reversed before powering up again, if the user is due to reverse power and burn, and we do not guarantee such problems. Do not plug in case of power motor drive easily lead to burn do not adjust the current in the motor is running. The correct approach is to first disconnect the power, unplug the motor, and then re-power, adjust potentiometer, measure the voltage on the potentiometer until the measured voltage is the same as expected. MKS Sbase board must be inserted TF card can be used, it must be prepared to TF card, and be careful not to use poor quality TF card. Ancillary products is not including: 4 stepper motor: 42 motor with line Limit switch 3: MKS limit switches Package Included: 1 x MKS SBASE V1.3 32-Bit Controller Panel Board 1 x USB Cable Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.