Features: Brand new and high quality. With rules of cartesian coordinate robot and extruder. Could control spare parts. With heater/fan output/three thermistor MOSFET. Integrated 5A extra safety and components protection. Suit for 5 Pololu stepper driver plate. Pololu plate pin socket. I2C/SPI pin for future development. All MOSFET with PWM pins. Servo connector used to connect end dog， motor and lighting diode. Rated current 3A. SD card add Kliment-Sdramps. LED indicates heater output. Two motor connects to Z Prusa Mendal. Size: 11.5cm x 3cm. Package Included: 1 x RAMPS 1.4 Controller NO Retail Box. Packed Safely in Bubble Bag.