This is the best crow calling app you will find. Connect the app to your speaker and amplifier system to play the crow calls loud. FEATURES: - 5 crow hunting calls - Effective, realistic and clear crow calls - Bluetooth compatible to sync to a Bluetooth speaker to play the crow calls - Crow hunting calls can play in the background of your phone allowing you to text, take pictures and surf the internet without disrupting the crow calls - The soundtracks allow you to set the crow calls and focus on crow 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 crow calls at a fraction of the cost of purchasing multiple soundtracks and memory cards separately Soundtracks included in "CrowPro" - A Murder of Crows - Crow Calls - Crows Communicating - Crow Calls - Mixed Bag - Crow Calls - Single Crow - Crow Calls - Calm Before the Storm - Crow Calls Download CrowPro crow calls and start having crow hunting success today!