120DB loud piercing panic alarm up to continuous about 1 hour work ensures your safty. Easy use: This product is small, portable and easy to use. Can be attached on backpack, belt loops, suitcases... Looks smart and fashionable. Keychain design is perfect for use with house keys or car keys. This personal alarm is made of ABS, 1000 times repeated routine tests of the switch pin ensures it won't break in your most emergency conditions. You will feel much safer having this protection for your children, your elderly parent or even for yourself while waiting at that dark isolated bus station. It is adopted for college and student, children security, police and correctional officers, walkers, joggers, elderly, night owls, lone workers. It's also a necessory supply for traveling, hiking, camping and walking the dog. The design and function is ideal for all ages.