Here is a personal safety device that can be attached to most smartphones on the market to get you out of trouble. The KATANA Safety Wallet has an audible siren that you can activate by pulling on the red tab. You also has a silent alert mode to let you get in touch with the Response Center discreetly.
KATANA lets you add up to 7 friends to your contact circle. It also holds up to 3 cards. Simply attach KATANA to the back of your phone, and you are ready to go.