Set your phone to see if this item is compatible.
Use the Nokia phone selector.
Entertainment - 0.17 MB
Sonic Grenade is an app aimed for crowd control and playing pranks on friends.
Disclaimer: Read the instructions before using.
Connect the phone to a stereo and turn up the volume. The app generates a very high frequency sound that is really annoying and headache producing.
You can use the application standalone. Hide the phone somewhere and play a prank on someone.