From the Publisher's web site:

This is the first expansion to the Beer & Pretzel's Game STARFIGHT. The expansion features four new ships, and new weapon type. This is not a game itself, you need the Starfight© base rules in order to use this expansion. This PDF contains:

A rule sheet
Four ship sheets
Four ship screens
Four ship counters

The new ships are all armed with long-range disintegrators!

Expands:

• Starfight