This pack includes:
4x Lego Technic Connector (circle shape)
4x Lego Brick Connector (square shape)
1 Year Extended Warranty 
(Linkbot, Mindstorms NXT/EV3, windmill, and other Lego parts are not included)
 
This pack allows Lego parts to be connected with Linkbot.  You can expand  Engineering Design with Robotics with this Lego Connection Pack. Considering Linkbot as a brick with two actuators, there are unlimited possibilities to build your own robot machines.
 
A sample project of Linkbot Windmill System using the Linkbot Lego Connection Pack.