Description: 2560 Control Board - The board is a microcontroller board based on the 16AU .It has 54 digital input/output pins (of which 14 can be used as PWM outputs), 16 analog inputs, 4 UARTs (hardware serial ports), a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started. RAMPS 1.4 - The modular design includes plug in stepper drivers and extruder control electronics on an for easy service, part replacement, upgrade-ability and expansion. LCD 12864 with Controller - This full graphic Smart Controller contains a SD-Card reader, an rotary encoder and a 128 x 64 dot matrix LCD display. You can easy connect it to your Ramps board using the "smart adapter" included. A4988 driver module. Specification: Processor speed: 100 Power supply current: 1A Power supply voltage: 5V Power: 100W Use: DIY Size: 120x100x70mm / 4.72x3.93x2.75inch Package Includes: 1 Piece RAMPS 1.4 Controller 1 Piece CH340 Board 1 Piece RAMPS LCD 12864 6 Pieces Endstop Mechanical Limit Switch With Cable 5 Pieces A4988 Stepper Motor Driver 5 Pieces Heatsink 1 Piece USB Cable 1 Piece L Type Adapter Plate 2 Pieces FC Cable Note: Warning: Connecting or disconnecting a stepper motor while the driver is powered can destroy the driver. (More generally, rewiring anything while it is powered isasking for trouble.)