The iSafe Built-in Alarm School Backpack - Blue Plaid provides "Mobile Personal Security" for the user. In a split second, you can activate two high decibel sirens and a high intensity strobe light simultaneously to attract immediate attention to a dangerous or harmful situation (louder than most car alarms). The bag provides great security for children, teens, women, nurses, professionals, campers, hikers, seniors and more. Backpack has plenty of room and compartments for students on the move. It can accommodate your mobile gear in secure compartments. Perfect for students who carry a cell phone, MP3 player and other valuables and want to protect themselves.