Connect the app to your speaker and amplifier system to play the specklebelly goose hunting calls loud. FEATURES: - 5 specklebelly goose hunting calls - Effective, realistic and clear specklebelly goose calls - Bluetooth compatible to sync to a Bluetooth speaker - Specklebelly goose hunting calls can play in the background of your phone allowing you to text, take pictures and surf the internet without disrupting the specklebelly goose calling sounds - The soundtracks allow you to set the specklebelly goose calls and focus on specklebelly goose hunting - Connect to your speaker system with audio cables or Bluetooth (cables not included) - No more forgetting to grab your MP3 player or memory cards, you always have your phone with you - E-Calling audio for calling specklebelly geese at a fraction of the cost of purchasing multiple soundtracks and memory cards separately Soundtracks included in "Specklebelly GoosePro" - Specklebelly Greeting - Specklebelly Comeback - Specklebelly Clucking - Specklebelly & Snow Geese - Specklebelly Double Download Specklebelly GoosePro and start having specklebelly goose hunting success today!