Brand: Elecfreaks - Color: White + black - Inherits all of Arduino MEGA2560's features 3.3V or 5V operating voltage selectable More visible location of indicator LEDs Wide range external input from 7~23V DC Evolved with SMD components The A4988 stepper motor driver carrier is a breakout board for Allegro's A4988 microstepping bipolar stepper motor driver. It operates from 8~35 V and can deliver up to approximately 1A per phase without a heat sink or forced air flow (it is rated for 2A per coil with sufficient additional cooling) - Mech Endstop: 3 cable interface 5V input Signal output; Working voltage: DC 5V - Micro SD Ramps: Working voltage: DC 3.3~5V Support Micro SD card up to 32GB - Packing List: - 1 x Freaduino Mega2560 - 1 x 3D Printer ramps shield v1.4 - 5 x A4988 stepstick - 5 x Heatsink - 1 x Heat sticker - 2 x Heat grease - 1 x Grease brush - 3 x Endstop (mechanical endstops) - 1 x Micro SD Ramps - 1 x USB cable (22cm)