This encoder attaches to your drive motor output shaft and measures every movement so that you can effectively "measure" a distance traveled, and allow for a lot of functionality with autonomous functions. Measures with greater precision than IR or ultrasonic sensors.

A Programming Kit is needed to change the program in the Vex Controller.

2 encoders included in this kit
plus 4 x 8-32 x 3/8" screws with nuts for mounting