Crawfish have long been a preferred forage for bass who feed on the crustaceans year-round. These protein-rich little mini lobsters make up a major percentage of a bass’s diet. The HydroWave Crawfish Expansion Module is finely tuned to emit the sounds and vibrations that fish, feel, hear and sense as natural crawfish activities. The Crawfish Expansion Module features four unique crawfish sounds. Included Sounds: 1) Crawfish on Gravel Finesse 2) Crawfish on Gravel Frenzy 3) Crawfish on Sand Finesse 4) Crawfish on Sand Frenzy What’s in the Box: - 1 Crawfish HydroWave Expansion Module - 2 Mounting Screws