This is the best duck caller lite app you will find. Connect the app to any BLUETOOTH speaker and amplifier system to play the duck calls loud. FEATURES: - 8 duck hunting calls - Effective, realistic and clear duck calls - Bluetooth compatible to sync to a Bluetooth speaker to play the duck calls free - Duck hunting calls can play in the background of your phone allowing you to text, take pictures and surf the internet without disrupting the duck calls - The soundtracks allow you to set the duck calls and focus on duck hunting - This is a great addition to other duck calls & tactics that you bring to the field or water for duck hunting - Connect to your speaker system with audio cables or Bluetooth (cables not included - If you want to be a duck commander and bring in more ducks (where legal) then this is the app for you - No more forgetting to grab your MP3 player or memory cards, you always have your phone with you - E-Calling audio for duck calls at a fraction of the cost of purchasing multiple soundtracks and memory cards separately to use for duck hunting Duck Calls included in "DuckPro" - Basic Quack - Duck Call - Greeting Call - Duck Call - Feed Call - Duck Call - Hail Call - Duck Call - Comeback Call - Duck Call - Lonesome Hen - Duck Calls for Duck Hunting - Pleading Call - Duck Call for Duck Hunting - Mallard Whistle - Duck Calls Download DuckPro duck calls app for mallard ducks and start having duck hunting success today!