When installed on the TETRIX™ DC Drive Motor, the TETRIX Motor Encoder Pack, along with the HiTechnic DC Motor Controller interface, enables your robot to move a fixed distance, rotate to a specific position, move at a constant speed, reset encoders, and read coders using the LEGO® MINDSTORMS® Education NXT Software. The pack includes one Motor Shaft Encoder, one Shaft Encoder Cable, one Aluminum Shaft Encoder Set Collar, and assembly instructions. Also compatible with LabVIEW™ and ROBOTC.