To use the Vernier NXT Adapter with LEGO® MINDSTORMS® NXT software, you need the Vernier Sensor Block. This is a free download. Instructions for importing the block into your MINDSTORMS NXT software and using it for programming are included in the download.
LEGO MINDSTORMS NXT software sold separately.
For MINDSTORMS NXT 2.0 or 2.1 Software