Watch as Lou Manfredini, Ace’s Home Expert, reviews the iMaxAlarm Personal Security Alarm. Designed to mimic a standard key fob, this keyring alarm is small but sounds a powerful call for help. Pull the top for an ear-splitting 130-decibel alarm that is as loud as a jet taking off. Pop the top back in to stop the sound. It’s reusable and can attach to a bag, belt, keychain, or be worn around your neck—perfect for students, apartment dwellers, campers, joggers, or anyone who wants an extra measure of safety on-hand.