The Extreme Dimension Ihunt handheld game call turns your phone into a powerful handheld game call by pairing this amplified speaker with the ihunt app. insert delays, repeats, overlap and volume changes for each sound to create a realistic scenario. You can make playlists using any number of sounds and any length and change volumes for each sound to replicate getting closer. Set the playlist and free up your hands for more important things than searching for a sound. Create playlists directly from your phone - no computer required. the ihunt app with over 700 calls is free with purchase.