Features: 2*5V servo motor (servo) port is coupled to its high-resolution high-precision timer - no jitter! Up to four bi-directional DC motor and 4 PWM speed (about 0.5% resolution) Up to 2 stepper motor control, single / double-step control, staggered or micro-step and the rotation angle control. 4-channel H-bridge: L293D each bridge chip provides .0.6 A (peak 1.2A) current and with thermal shutdown protection, 4.5V to 36V. Pull-down resistor to ensure that when the power the motor remains stopped. Large terminal terminals make wiring easier (10 - 22AWG) and power supply. With its reset button. 2 large terminal external power terminals to ensure separation of logic and motor drive power. Compatible with Mega, Diecimila, & Duemilanove. Provide full set of parts available for want-it-yourself DIY enthusiasts