Dear Marco.

Thank you for reaching out to us.

The main differences between the sensors are the charging cable type and the available golf courses.

The Phigolf 1 sensor uses a 5-pin charging cable, and HD courses are available with a paid subscription.

On the other hand, the Phigolf 2 sensor uses a USB-C charging cable and offers free access to HD courses.
Additionally, there are differences in the swing trainer’s length and material.

If you have any further questions, please feel free to contact us at info@phigolf.com, and we will be happy to assist you.

Thank you.