Specification:

This is a motor shield for Arduino that will control two DC motors. Based on the L298 H-bridge, the Ardumoto can drive up to 2 amps per channel. The board takes its power from the same Vin line as the Arduino board, includes blue and yellow LEDs to indicate active direction, and all driver lines are diode protected from back EMF.
Control for motor attached to OUT1/2 is connected to digital line 12 (direction A) and digital line 3 (PWM A).
Control for motor attached to OUT3/4 is connected to digital line 13 (direction B) and digital line 11 (PWM B).
Compatible screw terminals and connectors are listed below. They are not included in this SKU. You will need to add them to your cart separately.

This motor driver board have the same VIN with Arduino
Onboard LED to indicate the drive direction and speed
All drivers junction have a counter electromotive force protection diode
Ardumoto is a motor driver board is based on the L298P H-bridge chips.
It can control two DC motors.
Ardumoto each drive currents up to 2A.
Mainly used to drive small DC motors.
Ardumoto allows you to use a small current to control high current (current of the motor can be driven directly).