Blueback herring don’t take residence in many lakes throughout the country but if they do make a home in lakes near you, than you undoubtedly spend a good portion of your outings targeting bass in herring-rich water. The Herring HydroWave Expansion Module was made for such waterways and holds three herring specific sounds perfectly emulating this baitfish in variant conditions. Included Sounds: 1) Herring Passive 2) Herring Frenzy 3) Active Herring What’s in the Box: - Herring HydroWave Expansion Module - 2 Mounting Screws