RAMPS 1.5

PWM controlled soldered mosfet powered outputs	3
Heated bed control with 11A soldered fuse	1
Thermistor circuits	3
Pololu Stepper Driver sockets	5 (4 plus 1 extra for a possible second extruder)
Set of Digital Pins for endstops	6
Extra pins	PWM, digital, serial, SPI, I2C and analog
Operating Voltage	5V
Input Voltage (recommended)	7-12V
Input Voltage (limits)	6-20V
Clock Speed	16MHz
Does not include Arduino or Pololus

The RAMPS 1.5 must be connected to an Arduino Mega 2560 (not included) and will be an intermediary between it and all your 3D printer connections. All stepper motors, temperature sensors, limit switches, the resistance heating of the HeatedBed, and the fuser or fusers (if you decide to use more than one) will be connected to the RAMPS.

This new version differs from RAMPS 1.4 in less heat dissipation due to new mosfets attached to the motherboard.

For full functionality it is necessary to connect it to 5 bipolar stepper motor drivers.