This is a high current Double BTS7960 H-bridge Motor Driver.  It uses only four lines from your micro controller (not included) to drive the H-Bridge

This driver board is good for controlling higher powered DC motors in both directions.  It requires a micro controller to function. 

Specifications 

• Weight ~ 67 grams
• Size 2.00" x 2.00" x 1.65" 
• Supply Voltage 5.5v to 27v
• PWM input up to 25khz

Additional Information
Here is an instructable tutorial that shows how to use the Motor driver with an arduino 

http://www.instructables.com/id/Motor-Driver-BTS7960-43A/