The type of alarm you need will be determined by you and your individual situation.
We designed the KATANA Safety Wallet to make it easy for you to trigger an audible alarm by attaching our wristband to the alarm trigger (See #3 in the diagram below). 60% of crime is deterred by a loud alarm.
You can comfortably wear your wristband anytime however, it was designed for easy use when there is a potential for sudden danger: Running alone, in a crowded space with unknown people (bar, party, or street event).
It's also perfect for the instances when you particularly feel unsafe: walking through an empty campus at night or across a dark parking lot. If something happens, all you need to do is pull on the wristband and the alarm will be triggered.