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| Category | Entertainment | File Type | APK |
| Requirements | All Platforms | File Size | N/A |
| License | Free | Platform | Android |
| Offered By | N/A |
Ultrasonic high frequency sounds and some facts about them. Most adults can't hear ultrasounds higher than 14.9 kHz making them the perfect sound for a ringtone at school. Some of these sounds also have the side affect of really annoying people.
Call of Duty: Black Ops Zombies APK for Android
